The earth climate uas undergone changes both on regional and global scale particularly in last few decades. India has also unpredictable weather this year . The winteras have lasted longer than usual ultimately rains before cuting of crops and sudden rise of temperature during the day. America and europe had also unprecedented snowfall. The intensity of cyclones had also increased . The change of climate over is being attributed to global warming.
GLOBAL WARMING
It is the phenomenonin which temperature of earth is incrasing due to burning of fossil fuel . The gases produced by burning this fuel are called greenhouse gases. These are carbon dioxide , nitrous flouride , CFCs and hexaflouride
INVOLVMENT OF UN
The united nations constituted an Inter-Governmental panel on Climatic Change in 1988 with two aims first to study the climatic change which earth is undergoing and secondly to study its social, economical and cultural impact.
FINDINGS OF REPORT
The panel gave following report:
1. Emission of carbon dioxide upsets the natural flow of energy.
2. Deforestation increases global warming.
3. Rise in global temperature between 1.5 to 4 degrees by end of this century.
4. Rise in sea level.
KYOTO PROTOCOL
The historical meeting was held in kyoto (Japan) in 1997. It was attended by representatives of 180 countries. The protocol commits 38 developed countries to cut their emission of green house gases by 5.2% at 1990 level by 2008-12 level. Now the protocol will expire on 2020 as of doha, china meeting. Broadly europian union by 8% , USA by 7% and japan by 6% . India and china had been exempted from protocol because of their developing economy. However, India has retified the protocol by taking adequate measures to safeguard the environment.
Main points:
1.Many of developed countries including USA and Australia have not signed the protocol.
2. USA president Jeorge W.Bush has not signed by saying that the protocol exempts 80% world population including china and india major centers and deal will surely bring down our economy
3. While the fact is that America emmits 1/4th of green house gases in world.
4. India and china combined not making 1/2 of greenhouse gases emmited by USA.
EFFECTS OF GLOBAL WARMING
The following effects:
1. Faster melting of glacier both on mountains and in Arctic and Antarctic . Gangotri glacier is melting by 17 meters every year. This will surely lead to reduction of wter in summers. Their will surely be scarcity of drinking water. Melting of glaciers will also rise the sea level and can threaten many of the countries. India will also be affected as india has 7560 coastline.
2. Due to intense heat their will be more frequent rainfall and also result in flash floods.
3. Due to intense heat their the agriculture sector and would face scarcity.
3. Many diseases including Malaria would multiply.
4. Biodiversity would be affected and many of the species would be endangered.
WHAT SHOULD BE DONE
Countries should not waste more time and start taking action to cut down the emission of greenhouse gases. Tjey should have to look alternatives to fossil-fuels. The technologies of automobile engine, aircraft emission and working thermal power plants should have to be reviewed. Many developing countries including indoa and china have to be included post kyoto protocol 2012 . USA which has not retified should be encouraged to do same.
GLOBAL DIMMING
Like global warming global dimming is also the outcome of burning of fossil-fuels. When fossil fuels are burnt on the one hand it releases green housse gases and on the other hand it releases partoculate matter such as soot and ash in atmosphere which change the properties of clouds . As a result large size droplet is formed which reflect sunlight back and which causes globao dimming.
In a recent UN Human Development report certaimln important facts are:
1. The world must cut down their emission of greenhouse gases by 50% by 2050. India and china must cut down emission by 20%.
2. 15% of the population of developed countries is emitting 50% of the greenhouse gases.
3. Cuting down of emission will cost 1.6% of annual GDP to the world.
CONCLUSION
Climatic change is a global problem and needs a global solution. It should be the prime duty of every nation to prevent further deteriorating of situation by controlling their emission. Increasing energy efficiency and shifting to renewable sources of energy should be the first priority. We should adjist to climatic chang like conserving soip and water , constructing sea walls or flood walls. This would help coastal settlement and agriculture