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Universal Problem
World's Problems
No one can refuse to acknowledge this matter that the global warming is the biggest problem of the earth. In our day-to-day life we are living very happily.
Global warming is an overall increase in world's temperature.
The main causes for global warming are attributed to release of greenhouse gases in our environment. The greenhouse gases are carbon dioxide, Sulphur Dioxide, chloro fluoro gases, methane and nitrous oxide. The largest producers of these gases are the thermal plants, factories, Industries, road vehicles. But besides these nuclear fusion is the largest producer of greenhouse gases.
Dangerous radiation are produced during experiment of nuclear bomb weapons and arms. Direct manifestations of a widespread and long - term trend towards warmer g.lobal temperatures are following :
1. Heat waves and periods of usually warm weather.
The United Nations' Intergovernmental Panel on Climate Change (IPCC) reports that 11 of the past 12 years are among the dozen warmest since 1850. Average temperatures have climbed 1. 4 degree Fahrenheit ( 0. 8 degree Celsius). The 20th century's last two decades were the hottest in 400 years, according to the number of climate studies.
2. Ocean warming, sea level rise and coastal flooding
Current sea level rise has occurred at a mean rate of 1. 8 mm per year for the past century and more recently at rates estimated near 2.8 to 3.1 mm per year. IPCC assessment suggest that deltas and Small Island states are particularly vulnerable to sea level rise caused by both thermal expansion and ocean valume. Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. Small islands such as the Maldives, Tuvalu, Kiribati and Palau are in danger of being wiped off the face of the earth due to sea level rise triggered by climate change.
3. Glaciers melting
Glaciers and mountain snows are rapidly melting. The average melting rate of mountain glaciers has doubled since the turn of the millennium, with record losses seen in 2006 at several sites.
For example, Montana's Glacier National Park now has only less than 30 glaciers versus 150 in 1910.ln the Northern Hemisphere, thwas also come a week earlier in the spring and freezing begins a week later. The biggest glacier in Indian Kashmir, the Kolahoi glacier is shrinking 0.08 square kilometres a year, which is an alarming speed, said the study.
4. Arctic and Antarctic Warming
The Arctic is feeling the effects the most. Average temperatures in Alaska, western Canada and eastern Russia have risen at twice global average, according to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004 .
Arctic ice is rapidly disappearing, and the reason may have its first completely ice-free summer by 2040 or earlier.Polar bears and indigenous cultures are already suffering from the sea-ice loss.
Events foreshadow the types of impacts likely to become more frequent and widespread with continued warming.
5. Spreading Diseases
Bird flu is another example of a disease that is likely to spread more quickly as the Earth warms up, but for a different reason: A United Nations study found that global warming with excessive development is contributing to an increased loss of wetlands around the world.
This trend is already forcing disease carrying migrating birds , who ordinarily seek out wetlands as stopping points where they mingle with domestic poultry, risking the spread of the disease via animal- to- human and human- to- animal contact.
6. Plant and Animal Range Shifts and Population Changes
Global warming may drive a quarter of land animals and plants to the edge of extinction by 2050, a major international study has warned. In the worst case scenario, between a third to a half of land animal and plant species will face extermination.
7. Coral Reef Bleaching
Coral reefs, which are highly sensitive to small changes in water temperature, suffered the worst bleaching ---- or die - off in response to stress --- ever recorded in 1998, with some areas seeing bleach rates of 70%. Expert expect these sorts of events to increase in frequency and intensity in the next 50 years as sea temperatures rise.
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