Science Homework Help

I’m working on a Environmental Science question and need guidance to help me study.

help me finish a discussion board post , u need check the reading materials and video i provided first , and write ur thoughts according them , 150 words

after u finish this thoughts , i will provide my classmate’ a thoughts, u need reply her thoughts , 150 words

totally 300 words

https://drive.google.com/file/d/18UdK_mx_DkKr7yPpj… all materials in this link