Zhanjiang is creating a "national environmental protection model city", so protecting the environment is the responsibility of every citizen. The following practices are conducive to protecting the en

Zhanjiang is creating a "national environmental protection model city", so protecting the environment is the responsibility of every citizen. The following practices are conducive to protecting the environment ( (1) Because phosphorus is a nutrient element of plants, if a large amount of phosphorus-containing washing powder is used, the water body will be eutrophic, so phosphorus-free washing powder should be popularized.

Promoting the use of disposable wooden chopsticks will directly lead to a large number of trees and forests being cut down, so the practice is incorrect;

③ Rational use of chemical fertilizers and pesticides can avoid water pollution, which is correct;

Promoting the use of clean energy can save resources and reduce environmental pollution.

Therefore, ① ③ ④ is correct.

So choose C.