Tag: evs

The 'green revolution' refers to a series of research, and development, and technology transfer initiatives, occurring between the 1940s and the late 1960s, that increased agricultural production worldwide, particularly in the developing world, beginning most markedly in the late 1960s.
Green revolution in India began in the 1960s, through the introduction of high-yield crop varieties and application of modern agricultural techniques, and led to an increase in food production in India. 

Agriculture's Green Revolution helped meet the world's increasing demand for food, but it also contributes to a warming planet. With the advent of the Green Revolution (1940s- ‘60s), agricultural practices have expanded and intensified. As these revolutions led to the domestication, diversification, and plant reliance on fertilizers and pesticides, the emission of greenhouse gases increased, and is still rising. It is known that these greenhouse gases, like carbon dioxide, methane, and nitrous oxide, contribute to climate change.Since these gases are emitted from agricultural practices, global warming may be influenced by more factors than the general public is aware. It can be concluded that previous agricultural advancements have been beneficial in supplying food, but while they are feeding the growing human population, agricultural practices are also feeding global climate change. 

• Norman Ernest Borlaug was an American biologist who has been called as the father of the Green Revolution. 
• He took up an agricultural research position in Mexico, where he developed semi-dwarf, high-yield, disease-resistant wheat varieties.

• Renewable energy sources are energy sources that are always being replenished. They can never be depleted. Some examples of renewable energy sources are solar energy, wind energy, hydropower, geothermal energy, biomass energy, ethanol, jatropha plant, and bagasse.
• Ethanol, derived from plant material, is a renewable energy source because the production and combustion of ethanol complete a cycle.
  
• The oil from Jatropha plants is mainly converted into biodiesel for use in diesel engines(biodiesel).
  
• Bagasse is the dry pulpy residue left after the extraction of juice from sugar cane. Bagasse is usually combusted in furnaces to produce steam for power generation. 
• Hence ethanol, jatropha plant and Bagasse are the renewable sources of energy.
• So, the correct answer is 'All the above'.

The composition of biogas is :

• Biogas is a mixture of gases produced by the breakdown of organic matter in the absence of oxygen. It is produced by anaerobic digestion with methanogen or anaerobic organisms, which digest material inside a closed system, or fermentation of biodegradable materials.
• Biogas is primarily methane ($CH _4$) and carbon dioxide ($CO _2$) and may have small amounts of hydrogen sulfide ($H _2$S), moisture and siloxanes.
  
• Hence Methane is present predominantly in biogas.
• So, the correct answer is 'Methane'.