conservationist
A person who advocates for the protection and sustainable use of natural resources. Often used in environmental and political contexts.
He is a passionate conservationist and opposes deforestation.
Conservationists are promoting the use of renewable energy.
環境保護論者 is a broader term for 'environmentalist', focusing on the overall environment, while 天然資源保護論者 specifically emphasizes the conservation of natural resources.
Compound of 天然資源 (natural resources), 保護 (protection), and 論者 (advocate/theorist). The term is a straightforward modern coinage reflecting environmental concerns.