1. The environmentalist is working tirelessly to protect our oceans from pollution. - 环保人士正在不懈努力保护我们的海洋免受污染。

2. The environmentalist believes in sustainable living practices to preserve natural resources. - 环保人士相信可持续生活方式可以保护自然资源。

3. The environmentalist is advocating for stricter laws to regulate carbon emissions. - 环保人士正在倡导更严格的法律来规范碳排放。

4. The environmentalist is organizing a tree-planting event in the community. - 环保人士正在社区组织一场植树活动。

5. The environmentalist is speaking at a conference about the importance of biodiversity conservation. - 环保人士在会议上发言，强调生物多样性保护的重要性。

6. The environmentalist is leading a campaign to reduce plastic waste in the city. - 环保人士正在领导一场降低城市塑料废弃物的活动。