Question

1 min. speech on 'Global Warming'

Answer 1

                                  GLOBAL WARMING
global warming means earth is getting heated due to increase of carbondioxide in the atmosphere and getting holes to the ozone layer which protects us form harmfulradiations of sun

Answer 2

GLOBAL  WARNING ;
Increase in the concentration of carbon  dioxide in the air is one of the major causes of global warming.

When the solar radiation fall on the earth's surface, a part is reflected back into space. Greenhouse gases like carbon dioxide  and methane present in the atmosphere absorb some of the radiated heat. These trapped radiation further warm the earth.

The trapping of the sun's radiation  by the gases present in the earth's atmosphere is called greenhouse effect.

The causes of global warming are
1 Deforestation. 
2 Burning of fossil fuels.
3 Biological degradation of organic matter present in sewage which release methane gas.