It promotes hunting and fishing

It increases revenue from plastic souvenirs

It inspires sustainable behavior in tourists

It encourages environmental destruction

Carbon dioxide and oxygen

Potassium and iron

Sulfur and calcium

Nitrates and phosphates

Clear water

Disappearance of aquatic insects

Rapid growth of algae (algal bloom)

Death of fish

Decomposers break it down into ammonia

It disappears

It becomes carbon

It turns into water vapor

Nitrogen fixation

Decomposition

Photosynthesis

Denitrification

Hydroelectric dams do not produce pollution, but can disrupt ecosystems.

Hydroelectric dams do not produce pollution, and do not disrupt ecosystems.

Hydroelectric dams produce pollution, but do not disrupt ecosystems.

Hydroelectric dams produce pollution, and disrupt ecosystems.