I don't know how much will this help with Amazon rainforest catastrophy, but here is what you can do to help online:
Petition regarding Amazon:
http://chng.it/6y7LBQFBcD
WWF link where you can educate yourself on how you can make more impact:
https://www.wwf.org.uk/updates/5-ways-help-amazon-rainforest?utm_source=twitter&utm_medium=organic-social&utm_content=2308amazonfirethread&utm_term=organic-social&pc=GLJ002001