<P> Several biomes may appear similar - to, or merge via ecotones with, tropical rainforest: </P> <Dl> <Dt> Moist tropical seasonal forest </Dt> </Dl> <Dt> Moist tropical seasonal forest </Dt> <P> Moist tropical seasonal forests receive high overall rainfall with a warm summer wet season and a cooler winter dry season . Some trees in these forests drop some or all of their leaves during the winter dry season, thus they are sometimes called "tropical mixed forest". They are found in parts of South America, in Central America and around the Caribbean, in coastal West Africa, parts of the Indian subcontinent, and across much of Indochina . </P>

How many tropical rainforest are in the world