But the West uses the other 40% of biomass to produce heat, and it will increasingly use it to generate electricity. This makes sense, because solar and wind power are inherently unreliable – we still need electricity on cloudy days or when the wind dies down.
但西方国家却用另外40%的生物燃料来生成热能，还有意扩大其在发电领域的应用。这样做看似合情合理，因为太阳能和风能从本质上讲并不可靠——多云或者不刮风时我们仍然需要用电。生物燃料（配合水力资源）可以弥补太阳能和风能所固有的波动。