When it hits the surface, (light energy/become/heat energy?), The sun /warm /the earth, The greenhouse effect /absorb/ most of the harmful radiation, Use of fertilizers /lead/ to global warming?, Burning of fossil fuels /contribute/ to global warming, Water /not be/ necessary element in people’s lives, On average, the body of an adult human being /be/ 60% water, We /not lose / great amounts of water when we eat a hamburger, The amount of water in a human body /not vary/ according to age?, Even our bones /be/ 31% water, Water /cover/ more than three fourths of the Earth’s surface?, Adults /not have/ more water (as a percentage) than babies and kids.

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