Answer:
global warming
Explanation:
fossil fuels->destructive gasses->burn holes in ozone->deadly rays hit earth ->get trapped in atmosphere->EARTH HOTTER
Lungs take in gas from the Atmosphere, where the Oxygen is diffused into the blood cells, which take the Oxygen to different organs/places that need it. . .
Gills take in dissolved oxygen from the water, and then use diffusion like lungs.
Cutting down trees results in loss of habitat for many animals in the wild, because over 70% of animals that live on land live in trees! Cutting down trees can also reduce our oxygen.
