以下是一份英语四级作文模版：

1. 开头段：引入主题，提出论点，提供背景信息。

例：In recent years, the issue of environmental protection has become increasingly important in our society. It is widely believed that we should take immediate action to address this problem. In this essay, I will discuss the reasons why we need to protect the environment and suggest some solutions to this issue.

2. 主体段1：阐述第一个论点，提供相关例子和证据。

例：Firstly, environmental protection is important for our health. Pollution and environmental degradation have a negative impact on our physical and mental well-being. For example, air pollution can cause respiratory diseases and even cancer, while the degradation of natural habitats can lead to the extinction of certain species and disrupt the ecological balance.

3. 主体段2：阐述第二个论点，提供相关例子和证据。

例：Secondly, environmental protection is important for our economy. A healthy environment can provide us with natural resources and ecosystem services that are essential for our economic development. For example, forests can provide us with timber and other resources, while wetlands can help to purify water and prevent flooding. On the other hand, environmental degradation can lead to economic losses, such as the loss of tourism revenue due to pollution.

4. 主体段3：提出解决方案，阐述其优点和可行性。

例：To address the issue of environmental protection, we can take a number of measures. Firstly, we should raise public awareness of the importance of environmental protection and encourage people to adopt environmentally-friendly lifestyles. Secondly, we should strengthen environmental regulations and enforcement to ensure that polluters are held accountable for their actions. Finally, we should invest in research and development of clean technologies and renewable energy sources to reduce our reliance on fossil fuels.

5. 结尾段：总结全文，重申论点，提出建议。

例：In conclusion, environmental protection is an urgent issue that requires our immediate attention. By taking the measures mentioned above, we can protect our health, promote economic development, and ensure a sustainable future for ourselves and future generations. Therefore, it is essential that we all work together to address this issue and create a better world for ourselves and for the planet.