The causes of global warming are many and effects are far more profound.
What we have really witnessed in the last couple of decades is just the tip of the iceberg.
CAUSES The main underlying cause of Global Warming is greenhouse gases like carbon dioxide (CO2).
Every tree takes CO2 from the air during its growing process.
When a tree dies or the wood decays then CO2 is again returned to the atmosphere.
In the last couple of decades tropical forest have borne the brunt of major felling of trees and burning of wood, which has added more CO2 into the atmosphere.
Today deforestation has reached a stage where it cannot be turned back.
In 1987, a major chunk of the Amazon forest was burnt and it was of the size of Britain.
This released 500 million tons of CO2 into the atmosphere.
The lesser the number of trees, the less CO2 will be absorbed.
EFFECTS The effect of global warming will be catastrophic and if you look around you, then you will see some of the signs.
If no action is taken now, then it will be too late as the greenhouse effect will slowly increase the average global temperature by 1.
5 to 4.
50C.
This rise in temperature will affect the polar ice caps more than the tropical belt.
Winters will become warmer and the world will be hotter than what it was 100,000 years back.
By the end of the next century, the temperatures would have soared very high and it will be tough for humans to survive.
The last 15 years have been the ten hottest years since the 1860's.