她是一位知名的环保主义者。

She is a well-known ___environmentalist.

环保主义者经常倡导保护自然栖息地的政策。

___Environmentalists often advocate for policies that protect natural habitats.

作为一名环保主义者，他发起反对海洋塑料污染的运动。

As an ___environmentalist, he campaigns against plastic pollution in the oceans.