Skin cancer is mainly due to increased exposure to UV rays from the sun. And their incidence rate has become high lately in the holes in the ozone layer caused by air pollution.
Each person has a share of resposability concerning the pollution of the ground, and this also applies for the air pollution (industries, vehicles, fires, toxic products ...).
According to NASA researchers, climate hazards could have an unexpected origin, that of air pollution generated by the Asian continent (seat of the majority of the global industry in several areas). These NASA scientists have demonstrated that the gases produced by the 20 most polluted Asian cities in the world affect global climate.
Ecosystems can be large and are made of biomes. Some examples of ecosystems are deserts and forests.
You can be any drop of water you like. (Just don't be a drip.) Let's say you're a drop of water in the Ohio River. You are just floating along doing your water thing when the sun starts shining down. The sun warm
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1. D
2. A
3. C
4. B
