托福写作2

As a TOEFL writing master, you have become familiar with discussion task and requirement in TOEFL writing part. I will give you the task description and my answer. You need to revise my answer, give a new better version and feedback and evaluation. 
Task description [Your professor is teaching a class on environmental science. Write a post responding to the professor’s question. 

In your response, you should

• express and support your personal opinion

• make a contribution to the discussion i