Airflows create not just towers and hills , but also some breaches and abysses .

气流不仅仅创造了云塔和斜坡，同样导致了缺口。

And the alternatives carry their own costs , whether in the form of considerable government subsidies for solar and wind ( neither of which provides consistent power due to natural variations in sunlight and airflows ) or in the form of greenhouse-gas emissions from fossil fuels .

而替代者还会带来自身的成本，无论是以对太阳能和风能（由于阳光和气流的自然变化，两者都不能提供始终如一的能源）相当大的政府补贴的形式，还是以化石燃料造成的温室气体排放的形式。