Answer:
Getting rid of trees means they can't photosynthesis
Step-by-step explanation:
Photosynthesis is the process that all plants and trees do, they take in the CO2 that we breathe out and they turn it into oxygen for us to breathe in. If deforestation (getting rid of many trees) happens, it means they can't photosynthesis meaning CO2 stays in the air!
Hope this helps!