What are the usefulness of tropical and mangroves forests?

Question

What are the usefulness of tropical and mangroves forests?

Answer 1

Mangrove forests help reduce storm surges and even helped lessen the damage the tsunami did a couple years ago in areas that still had mangrove forests.

Answer 2

oxygen, fresh water, life, the list goes on and on. Tropical forests provide as heat absorber for hotter areas. Mangroves absorb salt an lower saline levels in surrounding vegetation. As well as most other benefits pointed out by everyone here

Answer 3

control climate

Answer 4

mangroves roots helps to prevent soil erosion and serves as a habitat for small fishes... :)

Answer 5

They  treat sewer and purify the water. .

Answer 6

Converting carbon dioxide into oxygen, food and habitat for animals.

Many parts of the world where forests of all kinds have been cleared now experience wild animals in the city.  The animals are driven there by lack of food and habitat.