Archive for January, 2012
Environmental technology (envirotech) or green technology (greentech) or clean technology (cleantech) is the utilization of the environmental science to preserve our natural environment and resources, and to reduce the negative effects of human activity. Environmental technology is centered on sustainable development.
Gasification is one example of green technology. It involves a combination of techniques aimed at pulling out energy from various types of organic matter. Gasification is a process that breaks down carbonaceous materials like coal, petroleum, biofuel, or biomass, and turns them into carbon monoxide and hydrogen by using extremely high temperatures and controlled amounts of oxygen and/or steam to turn raw material, for instance house waste, or compost, into gas. The gas mixture produced through gasification is called synthesis gas. Syngas in itself is a form of fuel. It is composed mainly of hydrogen, carbon dioxide, and carbon monoxide and has less than half the energy density of natural gas.
The latest form of gasification is the revolutionary Biosphere Technology which was created and developed by the renowned author of various original contributions in scientific literature, Dr. Chris McCormack. Dr. McCormack also serves as the Chairman and CEO of Global Environmental Energy Corporation (GEECF). Biosphere Technology siphons the combustibility of solid wastes and transforms it into a fuel that generates steam of extreme heat which in turn produces green electricity. What makes the Biosphere process unique is the fact that it is performed in a controlled environment of limited oxygen to limit most of the resulting atmospheric emissions. The biosphere chamber is where the biosphere process begins. It is where the solid wastes are placed and subjected to thermal transformation to convert them into syngas. The syngas is then transferred into a combined cycle gas/steam turbine from which electricity is generated.
“Biosphere MK-V” is the materialization of the BioSphere process as a means of generating green energy while at the same time putting into effect the clean disposal of energy wastes.
The By-Products of Biosphere Technology
Pozzolanic Ash is very rust resistant which makes it the chief component of rustproof materials built for underwater use. The high alkalinity of pozzolana also makes it especially resistant to usual types of sulfate corrosion. Fully hardened Pozzolanic Ash is also highly resistant to water absorption and spalling.
High Alloy Steel Wire
HASW is an alloy wire that “remembers” its original, cold-forged shape: returning the pre-deformed shape by heating. This material is a lightweight, solid-state alternative to conventional actuators such as hydraulic, pneumatic, and motor-based systems. Shape memory alloys have applications in industries including medical and aerospace.
The most frequent utilization of carbon black is as a tincture and reinforcing phase in automobile tires. Carbon black is also very helpful in absorbing heat away from the tread and belt area of the tire, resulting to reduced thermal damage and increased tire life. Carbon black particles are also being used as components in several radar absorbent materials and in photocopier and laser printer toner.
Electricity is an extremely flexible form of energy, and has been adapted to a huge, and growing, number of uses. Although electrification brought with it its own dangers, replacing the naked flames of gas lighting greatly reduced fire hazards within homes and factories. Public utilities were set up in many cities targeting the burgeoning market for electrical lighting.
Tags: atmospheric emissions, chris mccormack, density of natural gas, global environmental energy, steam turbine
PROMOTING SUSTAINABLE AGRICULTURE IN INDIA
D.AMUTHA.MA.MPHIL, ASST.PROFESSOR IN ECONOMICS
ST.MARY’S COLLEGE (AUTONOMOUS) TUTICORIN email@example.com
Agriculture sector, world over, has experienced a phenomenal growth since the mid-twentieth century. The growth, driven by Green Revolution technology, has made a significant dent on aggregate supply of food grains, ensuring food security to the growing population. The next stage of agricultural growth however, faces a serious challenge in terms of sustainability. Whereas the main problem faced by the developing countries in the south pertains to sustainability of resource use, the main challenge facing the developed economies in the north is overuse of chemical inputs. These problems have led to increasing awareness and a felt need for moving away from the input intensive agriculture perused during the Green revolution phase, to sustainable farming in different parts of the world. While the need for a paradigmatic shift in the growth strategy is well recognized, the transition from input intensive to sustainable farming however, has certain inherent difficulties. Notwithstanding these limitations, policies in both the north as well as the south have led increased emphasis on promoting sustainable agriculture.
India can safely be characterized as an agricultural country despite the recent spurt in manufacturing and services and the declining share of agriculture in the national income, since majority of its workforce (~ 65%) are still engaged in agriculture and allied activities. It has been the noblest profession in India since the time immemorial and has been carried out on sustainable basis. It is only relatively recent phenomenon that large-scale forest areas, grazing lands and waste lands have been converted into croplands to support the rising population, which has caused ecological imbalance and atmospheric pollution. With no further scope for expansion of agricultural land efforts have been made to enhance the production of food grains using high-yielding variety of seeds, fertilizers and irrigation along with advanced farm equipments. However, so-called green revolution is cofined to a few crops, viz, wheat, rice and maize and has been possible only in restricted areas, i.e., Punjab, Haryana and Western Uttar Pradesh and certain selected districts of Andhra Pradesh, Maharashtra and Tamilnadu.
Naturally much work is needed to lift the agriculture to a level where it is least affected by vagaries of monsoon and needs little from outside the farm, i.e., lesser dependence on chemical fertilizers and water. The limited success of green revolution has been a mixed bag in that it has given rise to new set of problems: overuse of water and fertilizers. Excessive use of water results in water logging and salinization whereas excess of fertilizers and pesticide cause pollution of water bodies contamination of ground water. India has the largest area of irrigated land (55 million hectares) of which about one-third land is already degraded and 7 million hectare have been abandoned1. In such a situation a renewable and lasting alternative, sustainable agriculture, has to emerge for successful agricultural revolution. In the present paper the need for sustainable agriculture has been emphasized. Policies for sustainable agriculture and organic farming and possible actions in India are discussed.
Need for sustainable agriculture
We can compare three broad types of farming: traditional production systems, conventional modern agriculture (such as Green Revolution technologies), and sustainable agriculture. We can compare them across three dimensions: ecological, economic and social.
Many traditional and most conventional farm practices are not ecologically sustainable: they overuse natural resources, reducing soil fertility, causing soil erosion, and contributing to global climatic change. Sustainable agriculture has several major advantages over both traditional and conventional practices:
Soil fertility: A continuous fall in soil fertility is a major problem in many parts of India. Sustainable agriculture improves fertility and soil structure and prevents erosion, so would be an answer to this problem.
Water: Irrigation is the biggest consumer of fresh water, and fertilizer and pesticides contaminate both surface- and groundwater. Sustainable agriculture increases the organic matter content of the topsoil, so raising its ability to retain and store water that falls as rain.
Biodiversity: Sustainable agricultural practices frequently involve mixed cropping, so increasing the diversity of crops produced and raising the diversity of insects and other animals and plants in and around fields.
Pollution: Pesticides are hazardous to human health as well as to the local ecology. Incorrect handling, storage and use of pesticides lead to health and pollution problems. Sustainable agriculture reduces or eliminates the use of hazardous chemicals; instead it controls pests with a variety of biological and agronomic measures and the use of natural substances.
Landscape: Agriculture and forestry clothe the rural landscape. Inappropriate use causes erosion, landslides and flooding, clogs irrigation channels, and reduces the ability of the land to support the local population. Impoverished rural people flock into the cities in search of jobs, forming unsightly, insanitary slums that further destroy the landscape. Rehabilitating ecologically damaged areas needs huge investments that few countries can afford. Sustainable agriculture avoids these problems by improving productivity, conserving the soil, avoiding the expansion of farming into unsuitable areas, and preserving rural jobs.
Climate: The way agriculture is practiced contributes significantly to global climatic changes. Conventional agriculture contributes to the production of greenhouse gases in various ways: by reducing the amount of carbon stored in the soil and in vegetation, through the production of methane in irrigated fields, and through energy-intensive activities such as the production of artificial fertilizers. Adopting sustainable agriculture would reduce these impacts significantly.
Agriculture cannot be sustainable unless it is economically viable over the long term. Conventional agriculture poses greater long-term economic risks than “sustainable” alternatives.
Export vs. local orientation: Governments tend to view export-oriented production systems as more important than those that supply domestic demands. This is misguided. Focusing on exports alone involves hidden costs: in transport, in assuring local food security, etc. Policies should treat domestic demand and in particular food security (either by farmers producing food for themselves, or by selling produce for cash they can use to buy food) as equally important to the visible trade balance.
Debt: The Green Revolution raised India’s grain output significantly, but a vast number of small-scale farmers ran into a debt trap: they took out loans to raise their production, and then found they could not pay the money back. About 40,000 were so desperate that they committed suicide.
Risk: Concentrating on specific commodities seems to promise high economic returns. But market production implies certain risks: markets change quickly, and international agricultural prices are dropping. Cheap foreign food may sweep into the national market, leaving Indian farmers without a market. As a World Trade Organization signatory, the Indian government is under pressure to deregulate and open its economy to the world market so cannot protect its farmers behind tariff walls.
Niche markets: Organic agriculture is one of the strongest ways to farm in an environmentally sustainable way. The demand for certified organic products is increasing quickly, opening opportunities to expand sales of such products and to explore niche markets.
Employment: Farming is the main source of employment for rural people. Trends towards specialization and mechanization may increase narrowly measured “efficiency”, but they reduce employment on the land. The welfare costs of unemployment must be taken into account when designing national agricultural support programmes. Sustainable agriculture, with its emphasis on small-scale, labour-intensive activities, helps overcome these problems.
The social sustainability of farming techniques is related to the ideas of social acceptability and justice.
Inclusiveness: Development cannot be sustainable unless it reduces poverty for the broad masses of people in India. The government must find ways to enable the rural poor to benefit from agricultural development.
Political unrest: Gaps between the “haves” and “have-nots” feed a feeling of social injustice among those who feel neglected and excluded from development opportunities, as well as from better-off sympathizers. The result is a climate favorable to political opposition and even violence.
Local acceptance: Many new technologies fail because they are based on practices or assumptions from outside. Sustainable agricultural practices usually are based on local social customs, traditions, norms and taboos, so local people are more likely to accept them and adapt them to their own needs.
Indigenous knowledge: Sustainable agricultural practices often rely on traditional knowhow and local innovation. Local people have a wealth of knowledge about their environment, crops and livestock. They keep locally adapted breeds and crop varieties. They have social structures that manage and conserve common resources, help people in need, and maintain the social fabric. Rather than ignoring or replacing this knowledge, sustainable agricultural development seeks to build on it and enrich it with appropriate information from outside.
Gender: In traditional agriculture, women traditionally bear the heaviest burdens in terms of labour. In modern conventional farming, too, men often benefit the most: they control what is grown and how the resulting income is spent. Sustainable agriculture attempts to ensure that the burdens and benefits are shared more equitably between men and women.
Food security: Traditional farming techniques often fail to produce enough food, or enough variety of food for a balanced diet. Conventional modern farming focuses on a few commodities, so people still do not have a balanced diet. Sustainable agriculture improves food security by improving the quality and nutritional value of the food, and by producing a bigger range of produce throughout the year.
Participation: Traditional society in India is raven by wealth and caste distinctions. Introducing conventional farming innovations tends to exacerbate these: the rich and higher-caste tend to benefit, while the poor and lower-caste are left out. Sustainable agricultural interventions consciously target the less well-off, and empower them so they can organize and speak with their own “voice”, so promoting dialogue and democracy.
Sustainable Agriculture in India
The sustainable agriculture may be defined as any set of agronomic practices that are economically viable, environmentally safe, and socially acceptable. If a cropping system requires large inputs of fertilizer that leak from the system to pollute ground water, drinking supplies and distant coastal fisheries, the system may be sustainable economically as the long-term supply of fertilizer is stable and the economic cost of fertilizer is easily borne by larger grain production but it is not sustainable environmentally or socially, since it does not cover the cost of environmental damage or social costs. The organic agriculture focuses on “living soil”, on optimizing the use of biological processes and on avoiding the use of synthetic chemicals and fertilizers.
Advocates of sustainable agriculture agree with biological focus and hope to reduce but not necessarily eliminate chemical use. In the context of sustainable agriculture another term “alternative agriculture” has been prominently used. Definition of alternative agriculture sheds much light on operational aspects of sustainable agriculture. Any food or fiber production that has
a more thorough incorporation of natural processes,
reduced use of off-farm inputs with less harm to environment and consumers,
a more productive use of biological and genetic potential of plants and animals,
a better match between cropping patterns and the physical capacity of lands and,
An improved emphasis on conservation of soil, water, energy and biological resources, is defined as alternative agriculture.
The normal agricultural practices using irrigation, chemical fertilizer, pesticides and high-yielding variety of seeds is called conventional agriculture. With increasing use of chemical fertilizers and pesticides the conventional agriculture is major source of pollution of inland water bodies and coastal seas. There has been growing criticism of conventional agriculture for its side effects, the “external costs” which impact communities, the environment, and human health.
As for indicators of sustainability there is no single prescription. Sustainable practices will vary by cropping system, local environment and socio-economic system. Still, experience tells us that locally sustainable systems tend to be more resource conservative than less sustainable system and tend to rely less on external inputs and more on internal ecosystem services.
India – Policies for Sustainable Agriculture and Organic Farming
The Indian government’s policies have always emphasized food grain self-sufficiency, which has not necessarily coincided with agricultural sustainability. The growth of agricultural production and productivity, which had risen significantly during 1970s and 1980s, declined during 1990s. These slowdowns have worsened since 2000, both overall agricultural production and food grains production have shown negative growth rates in 2000-01 to 2002-03 period. Decline in the growth rates of agricultural production and productivity is a serious issue considering the questions of food security, livelihood, and environment. As such, a critical examination of the approaches for sustainable agricultural development is necessary. This examination must be framed not only by India’s ongoing need to ensure food self-sufficiency but also by the consequences of access to international markets.
Sustainable Agriculture – Possible Actions in India
• Improvement of existing production systems (e.g. altered crop rotations, introduction of green manuring, use of plant species adapted to specific locations)
• Improved protection of natural resources (e.g. erosion protection)
• Increase in efficiency of existing resources (e.g. irrigation, use of technology, basic and advanced training)
• Introduction of regenerative branches of business (e.g. horticulture or aquaculture)
• Introduction of a new production element in existing enterprises (such as fruit trees to stabilize terraced fields, fish-farming in rice fields)
• Optimization of post-harvest systems (e.g. storage)
• Increase the value of agricultural products through further processing (e.g. production of yoghurt from milk)
• Improvement of channels of distribution (e.g. market access, transport)
• Access to loans and other financial services
• Covering risk (e.g. through land law, support of producer groups)
Under the changing agricultural scenario, the agricultural technologies needs a shift from production oriented to profit oriented sustainable farming. In this direction, the pace of adoption of resource conserving technologies (RCTs) by the Indian farmers is satisfactory to a larger extent but, under the present scenario, we are in the half way of conservation agriculture. The CA systems will leads to sustainable farming and will be the most thrust of the future farming.
The conditions for development of sustainable agriculture are becoming more and more favorable. New opportunities are opening the eyes of farmers, development workers, researchers and policy makers. They now see the potential and importance of these practices not only for their direct economic interest but also as the basis of further intensification and ecological sustainability. This does not mean that agrochemicals can be abandoned. Also, research has an important role to play. Bankers and funders should think of how best to provide incentives and credits, accessible to poor farmers and women, to make investment in dry land farming possible. As conditions for farming will continue to change, the key to sustainable agriculture is the capacity of farmers and all other actors in agricultural development, as well as the wider society, to learn, experiment, adapt and cooperate in an effective way. To conclude, a small farm management to improve productivity, profitability and sustainability of the farming system will go a long way to ensure the all round sustainability.
Vyas V. S. (2003), India’s Agrarian Structure, Economic Policies and Sustainable Development, Academic Foundation Publishers, New Delhi.
Puttaswamaiah. S. (2005), Sustainable Agriculture: An Exploratory Analysis of Two Approaches in India, Report under the Shastri Applied Research Programme, by Indo-Shastri Canadian Institute, New Delhi, at the Gujarat Institute of Development Research, Ahmedabad.
Lotter, D.W. (2003), Organic agriculture. Journal of Sustainable Agriculture 21(4)
AAFC (2003), Sustainable Development Strategy Sustainable Agriculture: Our Path Forward, Departmental Publication Services, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada.
Kushwaha Niru (2003) Environment, Sustainable Development and Rural Poverty in India. Ph.D. Thesis, M.J.P. Rohilkhand University, Bareilly Ch. 4.
DFID (2004) Agricultural Sustainability. Working Paper Nr. 12, UK Department of International Development (DFID), London. http://d_dagriculture- consultation.nri.org/summaries/wp12.pdf (11.4.2008)
Surendranath, C. (2003), Organic: Market-driven and sustainable? Available at: http://www.indiatogether.org/2003/nov/agr-jaivakerl.htm
Garibay, S. V., and K. Jyoti (2003), Market Opportunities and Challenges for Indian Organic Products, available at: http://orgprints.org/00002684
http://www.indiatogether.org/Tags: asst professor, food grains, intensive agriculture, mid twentieth century, sustainable farming
Twtter is the biggest all in one Twitter application directory. People here can subscribe to whole lots of apps and get benefits- of all the applications free of cost. Twitter is not just a place where you Tweet, it is more than that where people can share and help each other out. So, twtter has been making application that makes user ease their twitter.
Well for a marketer, a twitter multi account manager is a great application indeed. You can access to multiple accounts once you approve for a particular twitter account. You just need one time login and one time approval for an account. You can have lots of benefits such as Easy tweet, multi RSS subscription, mass following and more.Tags: application directory, marketer, time login, tweet, twitter