Con Dao National Park provides a rich ________ for marine life.
habitat
Forests help release oxygen and absorb _____________; they also provide homes for many species.
carbon dioxide
cutting down trees
building a camp fire
protecting endangered species
picking up rubbish
________________ is a serious environmental concern as it harms natural habitats.
cutting down trees
People in my neighbourhood are doing a lot to save _________________.
endangered species
saving water
An __________ may be a whole forest, or a small pond, and it can be of any size.
ecosystem