സെൻറ് മേരീസ് എച്ച്.എസ്.എസ്.പട്ടം/അക്ഷരവൃക്ഷം/ Environmental crisis

Environmental crisis    Environmental crisis Nowadays our world faces a large problem about our environment and unhygienic situations these are caused by the unremarkable mistakes of human beings Whole planet is now one community and the proper exploitation of the community is to serve people and environment as equal the present day global set of local sovereign state is not capable of saving the biosphere from pollutionsOver the past 40 years modern concerns about the environment have gone through a series of phases. One of the important features of the phases is that they tend to become increasingly globalized and are directly linked to the massive economic expansion since World War II. The initial first phase started in the 1950s when the early concerns were raised about the use of chemicals in agriculture and the first comprehensive legislation to combat air pollution in Britain and the US were introduced. The first phase saw the publication of Rachel Carson's Silent Spring in 1962 and led to the ban on DDT in Britain and other countries during the 1960s. The second phase started in the late 1960s, when a flurry of publications voiced concern about the degradation of the planet's environment caused by unbridled population growth and economic development. Paul Ehrlich's The Population Bomb warned that the rapid increase of the world's population over the course of the 20th century would soon hit a ceiling. By doing so, Malthus' thesis of population growth and collapse caused by reaching environmental limits was reintroduced into contemporary political thinking in economics as well as environmentalisThese warnings, that humanity was heading toward an ecological disaster, had a profound impact on politics and society in the 1970s. Many countries introduced measures and legislation to combat local or regional air and water pollution as well as the contamination of soils. Furthermore, measures were taken to make economies more energy efficient, something that became even more urgent after the energy crises of 1973 and 1979. The second phase of environmental concern came to an abrupt end when, by the early 1980s, scientists started to observe disturbing signs that human activity was significantly affecting the environment on a global scale. The third phase of environmental concern had begun. The first of these signs came in the form of a thinning of the stratospheric ozone layer over the polar regions of the globe. This was caused by CFC aerosols used in spray cans and refrigerating systems which, when released into the atmosphere, led to a depletion of stratospheric ozone. Since stratospheric ozone protects us from deadly cosmic radiation it was an urgent problem that had to be tackled since we could not afford to let this get out of control. If that happened, life on earth was facing a very uncertain future. Swift action was taken and by 1987 the Montreal Protocol outlawed the production of all CFCs. By that time the major producers of this gas, the US, Canada and Scandinavian countries had already ceased production. Soon the rest of the world followed It is well defined that the main problems faced by the world is excess use of CFC and poisonous chemicals Sarvesh A. Thapasy 10 U സെന്റ് മേരീസ് ഹയർ സെക്കന്ററി സ്കൂൾ, പട്ടം തിരുവനന്തപുരം നോർത്ത് ഉപജില്ല തിരുവനന്തപുരം അക്ഷരവൃക്ഷം പദ്ധതി, 2020 ലേഖനം  സാങ്കേതിക പരിശോധന - Sreejaashok25 തീയ്യതി: 20/ 04/ 2020 >> രചനാവിഭാഗം - ലേഖനം