Why is the Amazon basin ecologically so important?

Answer 1

Read lots and let us know what you discover.

http://wwf.panda.org/what_we_do/where_we_work/amazon/about_the_amazon/why_amazon_important/

https://rainforests.mongabay.com/amazon/amazon_importance.htm

https://www.e-education.psu.edu/geog30/node/395