精选优质文档-倾情为你奉上2019年大学英语四级写作万能模板：环境类话题 环境类话题 温室效应 This is not an easy task, so nations should work together to prevent this global disaster, at the same time ordinary citizens should do their part. 这项工作任重道远，所以各个国家要联合起来共同组织这场世界性的灾难，同时每个公民也要尽自己的一份努力。 人口爆炸 Campaigns should be launched to raise the awareness of family planning, safeguarding the environment and slowing the population growth. 我们应该展开各种活动增强人们对于计划生育，保护环境和控制人口增长方面的意识。 地球环境 1. It is time for us to take
