这位环境保护主义者发表了一场关于保护热带雨林的激情演讲。

The ___environmentalist gave a passionate speech about protecting the rainforest.

许多环境保护主义者倡导转向使用可再生能源。

Many ___environmentalists advocate for switching to renewable energy sources.

一位著名的环境保护主义者撰写了这本关于气候变化影响的书。

A well-known ___environmentalist wrote this book on the impacts of climate change.