Global warming means the growing of temperature  on earth.The world temperature is growing at an alarming rate day after day.The growing of industry, the use of chloro Fluoro carbons (CFC) in packaging and manufacturing commercial products,the use of detergents such as washing powder and liquid etc.accelerate to grow the temperature on earth.Again the cutting and burning down of tropical rain forests,the destruction of tree etc.add the temperature.Not only that,the traffics that play on streets and their use of petrol and diesel also help to create global warming.It has disastrous effects.It will catastrophically reduce mankind ability to grow food,destroy or severely damage wildlife and wilderness.This global warming will raise sea level and flood coastal areas and farmland.this global warming assumes a great threat to us.we have to become very careful.we have to create consciousness against deforestation and gases.Otherwise,our existence will be imperiled.