Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

气候变化正在发生，是人类造成的，我认为这可能是我们面临的最严重的环境问题。

-- Bill Nye 比尔·奈