Global warming is the greatest challenge facing our planet. It is in fact the increase in the temperature of the earth’s neon-surface air. It is the one of the most current and widely discussed phenomena. It has far reaching impact on bio-diversity and climatic conditions of the planet. Several recent trends demonstrate that global warming is directly its exercising impact on sea levels, melting of ice caps and worldwide climate changes. In short global warming represents a fundamental threat to all living things on earth.
Average global temperature rose considerably during the past century. The prevailing scientific view is that most of the temperature increase since mid-20th century has been caused by increases in atmospheric greenhouse gas concentrations produced by human activity. Most scientists agree that the planet’s temperature has risen 0.5 degree Celsius since 1900 was the hottest year in the last century. Together with 1991, the years of 1983,1987,1988 and 1989 have been measured to be the warmest 6 years in the last one hundred years. The year 1991 was the second warmest year of the past century. The consequences of the rise in temperature is being felt all over the globe. The findings of scientific research done in this field reveal that the temperature of the earth is likely to rise from 1.4 degree Celsius to 5.8 degree Celsius within a period of hundred years. Unfortunately ,the imbalance which we have created between our life and earth is already showing the signs of disaster in the form of floods,cyclones,landslides,tsunami,drought, etc. if the imbalance continues to rise it would definitely lead to grave repercussions.
Carbon dioxide which is an important constituent of the environment is causing a warming effect on the earth’s surface. It increases the evaporation of water into the atmosphere. Since water vapour itself is a greenhouse gas. This cause still more warming. The warming causes more water vapour to be evaporated. The Carbon dioxide level is expected to rise in future due to ongoing burning of fossil fuels and land use change. The rate of rise will depend largely on certain economic, sociological, technological and natural developments. Other gases such as methane, CFCs, nitrous oxide, troposphere ozone are also responsible for global warming. Increases in all these gases are due to explosive population growth, increased industrial expansion, technological advancement, deforestation, growing urbanization etc.
Global warming is great threat to flora and fauna of the earth. A large number of species may become extinct. The expanse of desert would increase. Low rainfall and rising temperature would add to the intensity and frequency of dust storms. This in turn will immensely affect the quality of agricultural land, ultimately causing adverse effect on agricultural produce. It would have far-reaching socio-economic impact also.
Forestation can be of great help for the reduction of global warming. Planting more trees and reducing timber cuts worldwide will help restore the imbalance to a great extent. And we must follow the environmental policy of “reduce, reuse, recycle”, ie, promoting the reuse of anything. The use of fuel-efficient vehicles should be promoted. And every individual should be aware of the importance of protecting the environment. Besides eco-friendly technologies must be promoted.