it is important to learn how we can protect the environment

It is important to learn how we can protect the environment. it is important to learn how we can protect the environment 用不定式结构将It's important to learn how we can protect the enviro 这个句子正确吗?To protect the environment,it is very important for To protect the environment is important.(改为用It开头的句子） To protect the environment is important.(改为同义句) How to protect the environment how can you help to protect the environment? What can we personally do to protect the environment? We found___necessary to protect the environment.A.it B.this how important it is to learn English. It is our duty to protect the environment