 |
Groundwater depletion in cropping pattern
Water is an important input. It is used for many purpose - domestic, irrigation, industrial, navigation, hydro - electric power generation, etc. The quality and quantity of water required to satisfy each of these demands vary considerably depending upon types of demand, geographical locations, standard of living, climatic conditions and other factors. However, according to the directorate of Groundwater, Tamil Nadu State (2001), there are more than 18 lakh tube wells can be constructed in the districts of Coimbatore, Salem, Namakkal, Madurai, Erode and parts of Tutitcorin. While in other districts water is available at 300 to 800 feet, in Rasipuram it is available in 1000 feet. Under groundwater, together with the waters of the seas, rivers and lakes, has been serving people throughout the history of mankind. At present, the unprecedented advancement of the economic development of the new territories and the extent of man's influence on nature make it necessary to consider not ...
are objects so dense that not even light can escape their gravity, and since nothing can travel faster than light, nothing can escape from inside a black hole . Loosely speaking, a black hole is a region of space that has so much mass concentrated in it that there is no way for a nearby object to escape its gravitational pull. Since our best theory...
"We Have An Because We Have A People Crisis - A Crisis of Population Growth, of Wasteful Consumption of Resources, and A Crisis of Apathy and Inaction." An environmental crisis is an emergency concerned with the place in which every human lives - the environment. A people crisis is an emergency with the community that inhabits the world environmen...
' work on planetary motion stood an a very high mathematical level for his times. His theory explained how all the celestial bodies move around the Sun. It took Nicolaus 30 years of mathematical research to form a theory about planetary motion. The three most popular instruments which used were quadrant, armilla, and triquetrum. All furnish so...
Two hundred years ago, Thomas Robert Malthus, a British intellect , wrote 'An Essay on the Principle of Population' in which he argued that the world population would increase faster than the food supply, with disastrous results for the general human welfare. A world population of 250 million at the time of Christ has now grown to 5.7 billion in sp...
In the essay "A Planet for the Taking," David Suzuki describes Canadians' odd appreciation for this great natural bounty we call our own. He is an internationally acclaimed scientist who is concerned about the welfare of Canada. Suzuki's intended audience is the Canadian population that does not realize the grave danger they are instilling upon t...
