You have been asked to prepare a short composition (about 200 words) for a school magazine on 'Plastic Pollution and Its Consequences.' The composition should cover an introduction, main causes, environmental and human impacts, and possible remedies. Additionally, provide a single introductory sentence, list three primary causes, and list three practical solutions that individuals and communities can adopt.

a. Write the full composition in about 200 words.

b. Give a single clear introductory sentence for the composition.

c. List three primary causes of plastic pollution (brief).

d. List three practical solutions individuals or communities can adopt (brief).