One of the biggest problems to the environment is when my Pa was a boy, there was two or three times less people than there are now. Which means they had to use two times less food, houses, trees, and water. The reason why this is a problem is because the less trees there are, the more carbon dioxide goes into the air. And the more people hunt animals, the less animals there are. And if this keeps up, the polar ice caps are going to melt. And all ocean-tipped states will be flooded.