| 作文首页初中作文寒假作文写人作文写景作文英语作文想象作文抒情作文议论文说明文单元作文科幻作文诗歌词赋写作素材 小学作文高中作文暑假作文写事作文写物作文节日作文话题作文描写作文记述文应用文毕业作文散文随笔日记游记写作指导 |
nowadays humanity is faced with a lot of troublesome problems: energy crisis, cancer, pollution, population explosion, tec. they are threatening the survival of humanity. therefore, some people are pessimistic about the future of humanity.
they are pessimistic because they think that limited energy on earth will be exhausted soon; incurable diseases are threatening more people's lives; pollution is worsening the environment; population explosion will make food shortage even more serious.
actually they needn't worry too much about these problems. scientists will have developed new energy resources by the time oil and coal are used up. besides, scientists are making a thorough study of genes and they will manage to cure cancer by adjusting the arrangement of genes. they are also making efforts to control pollution and population. furthermore, all the governments in the world are concerned about these problems and they ahve taken measures to solve these problems.
therefore, we have every reason to be sure that human beings will conquer nature but they will never be conquered.