What is environmental protection? This seems to be a very vague concept. In fact, the water we drink, the paper we use, the cans of drinks and the greening of the campus can all be classified as environmental protection. To this end, we should give full play to our subjective initiative, save every drop of water, every piece of paper, and care for every blade of grass ... empty slogan is perfunctory, but action is embodiment. True knowledge comes from practice, and only in practice can we deeply understand the significance of environmental protection.