生物多样性 (shēngwù duōyàng xìng): biodiversity - the variety of plant and animal species in an ecosystem.
气候变化 (qìhòu biànhuà): climate change - long-term shifts in temperature and weather patterns caused by human activities.
可持续发展 (kěchíxù fāzhǎn): sustainable development - using resources in a way that meets present needs without compromising future generations' ability to meet their own needs.