When it comes to old-fashioned removal methods, they're troublingly tenacious.

说到老式的清除方法，它们的顽强程度令人不安。

People often burn the waste at night because safer removal methods are not available.

人们经常在晚上焚烧废物，因为没有更安全的处理方法。

Farms offer the next biggest and least costly carbon dioxide removal method.

农场提供了下一个最大和成本最低的二氧化碳去除方法。

Carbon removal methods such as DAC may be very useful if they can pull pollution from the air and store it permanently in the Earth or in new products.

如果直接空气碳捕获等碳去除方法能够真的做到将空气中的污染物永久储存在地球上或新产品中，那么它们可能会非常有用。