How can you control the harmful effects of human activities to the environment?

Firstly, a ban can be established saying that human activities which destroy the environment is punishable by law.

Secondly, regulations can be used. For example, air-conditioners' temperatures must be set to, say an example, 24 degrees celsius in all shopping centers so as to reduce global warming.

Thirdly, the government or authorities can introduce activities such as beach cleaning and such, so as to get the community involved so as to raise awareness on these issues, at the same time reducing the impacts on these activities.