In mathematics, you don't understand things. You just get used to them.
可持续性不仅仅是植树;它是为了正确的理由在正确的地方种植正确的树木。
能源的未来不是要在煤炭和可再生能源之间做出选择,而是找到正确的平衡。
We're not going to run out of ammunition.