问答题

Sustainable development has been a hot issue throughout the world at present. Sustainable development is development that meets the needs of the present without diminishing the ability of future generations to meet their own needs. Study the following set of drawings carefully and write an essay of about 120 words in which you should:
1) describe the set of drawings;
2) state its main idea;
3) give your comment.


One generation plants the trees in whose shade another generation rests.