Answer: True
Step-by-step explanation:
The wetland is considered as natural water filters because they clean up the fertilizers and pesticides from the agricultural run off, waste from the industries like mercury can also be treated with the help of wetlands.It has variety of plants and animals present in it to clean the pollution.
The other types of pollution from industries and other sources can also be treated by wetlands. Without wetlands, the government will need to invest more on cleaning of the water bodies.
So, it is true that wetlands are important as they serve as natural filters for pollution.