What is it?
natural resource depletion
What is it?
global warming
What is it?
air pollution
What is it?
animal extinction
What is it?
protect
What is it?
put on
What is it?
overpopulation
What is it?
polutte
What is it?
waste disposal
What is it?
throw away
What is it?
donate
What is it?
deforestation
What is it?
recycle
What is it?
environment
What is it?
soil pollution
What is it?
acid rain
What is it?
eco-friendly
What is it?
grow