Mangrove forests or swamps grow in saline and humid region of the tropical and subtropical areas. They were considered unhealthy, unproductive environments.
Mangroves are special forest trees that are found in regions of high salinity. In earlier times they were considered unhealthy and unproductive for the environment.
They were seen as of no importance and the people wanted them to remove the trees so the environment can become healthy again.
Its ecological value was not known at that time and was considered a waste and mess. But now people have to account for their importance of them as they help to improve the water quality and aid as the breeding place for the fishes.
Therefore, the statement is true.
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