What natural resources do we get from swamps?
Freshwater swamps provide water. That may seem obvious, but there is a bit more to it. The ecosystem naturally filters water, the plants absorbing overabundant nutrients. They also absorb water from heavy flooding, acting as a giant sponge. They also protect from erosion. The water in swamps helps with all of this.
Several swamps, such as the Okefenokee, provide peat. Peat is the origin material of coal. This peat, left for many years, forms into coal. In a way, swamps provide coal, one of the most used fuels in the world.
Swamps, by definition, contain trees. Most commonly cypress trees are found in swamps, but there are several other types. These trees can be used for lumber, although sparingly, or else the swamps will become deforested, such as in the picture above.