The warming of the Earth is caused by exhaust gas from automobile engines, fatories and power (23)_________. Carbon dioxide goes up into the atmosphere, and it form a kind of screen that keeps or allows the sunshine in but stop the Earth heart (24) _________getting out. It works like a greenhouse, that’s why we call (25) _________the Green House effect.

Because of this effect, the Earth is getting warmer all the time. This (26) _________in temperature will cause big changes to the world’s climate. The sea level will increase as the ice (27) _________the poles will melt.

The warming of the Earth is caused by exhaust gas from automobile engines, fatories and power (23)_________.