Global improvements in diet, education, healthcare, and infrastructure are necessary for a healthier planet. Giving to poor communities is a positive-sum action; everybody benefits.

If you are kind enough to invest in our planet through a donation to those less fortunate, make sure to choose cost-effective, evidence-backed charities. Even well-meaning charities can fail to have an impact.

My recommendations are (no affiliations): 

givewell.org 

Funds.effectivealtruism.org