Ans. People are burning fuels with carbon as their main ingredient. Besides these, oil, gas, and coal are used in cars, aeroplanes,power stations and so on. This produces carbon dioxide which mixes with oxygen and add to our greenhouse problem which makes the planet more warmed and causes the water in the oceans to overflow.

Ans. A conference was held at Kyoto in Japan to get the solution of a great problem, namely climate change which has many bad effects on living beings. 

   It was not fruitful because too many promises were made they are not being followed later.

Ans. There are many reasons behind global warming:

 (i) Excessive use of fuels whose main ingredient is carbon. 

  (ii) Use of oil, gas, coal in cars, aeroplanes and power stations.

  (iii) Use of excessive heaters and air conditioners. 

  (iv)  Use of plastics.

Ans. Poor people will suffer most because when due to climate change the ice of the poles will be melting, it will flood the low lying areas first. Not only that, the water itself will take up more space simply because it become warmer. That will make it overflow even more on to the land.  That's why the poor people will loose their habitat and become homeless which is the saddest part of the climate change.