在2021年的高考中，英语作文部分往往考察学生对于社会热点问题的理解以及表达能力。以下是一篇符合当年考试要求的作文范例：

题目：The Importance of Environmental Protection

With the rapid development of modern society, environmental issues have become increasingly prominent. As we all know, pollution and global warming are threatening our planet. It is high time that we took action to protect our environment.

Firstly, reducing waste is crucial. People should try to use recyclable materials and reduce unnecessary packaging. Secondly, energy conservation is equally important. We can save electricity by turning off lights when not in use and using energy-efficient appliances. Lastly, public transportation plays an essential role in reducing carbon emissions. Encouraging more people to use buses or trains instead of private cars will significantly decrease air pollution.

In conclusion, protecting the environment is everyone's responsibility. By making small changes in our daily lives, we can make a big difference to the future of our planet. Let us work together to create a cleaner and healthier world for generations to come.

这篇作文简洁明了，结构清晰，涵盖了环境保护的重要性和具体措施，适合用于模拟或实际考试场景。希望对考生有所帮助！