1 - Amazonia, Indonesia, Central Africa, New Guinea.
2 - It's hot and rainy
3 - Belize, Honduras, Costa Rice, Columbia, Venezuela, Guiana, Brazil, Gabon, Cameroon, Central African Republic, Equatorial Africa, Congo, DRC, Indonesia, New Guinea, Cambodia, Thailand, India and Philippines.
4 - It was bigger
5 - Because people chop down trees.
6 - Tree chopping, industrial pollution.