Global warming

  An increase in the average temperature of Earth’s near surface air and oceans since the mid-20th century 4th assessment report of IPCC: global temperature increased 74+0.18 degree C during the 20th century. Caused by greenhouse gases Water vapour, Co2, Methane, Nitrous Oxide, Ozone, CFCs (in order of abundance) Since the industrial revolution, the burning of fossil fuels has increased … Read more

Population growth, distribution and density

  India is the second most populous country in the world next only to China. On March 1, 2011 the total population of India was at 1.247 billion. This accounted for 17.5% of the world’s total population. In other words, about every sixth person in the world there is an Indian. China, the most populous country … Read more

Non- metallic and conventional minerals [coal,petroleum and natural gas), (c) hydro electricity and non conventional sources of energy (Solar, Wind, bio-gas),(d) energy sources Their distribution and conservation.

  Petroleum, natural gas, coal, nitrogen, uranium and water power are examples of conventional sources of energy. They’re also called non-renewable sources of energy and are mainly fossil fuels, except water power. Rising growth of population has created a tremendous pressure on the conventional resources of energy and thus the concept of sustainable development get prominent … Read more