Some types, such as Marine stratocumulus clouds, can have a significant cooling effect thanks to their ability to reflect sunlight back out to space before it ever reaches the surface of the planet.

某些类型的云，例如海洋层积云，由于它们拥有在阳光最终照射到星球表面之前便将阳光反射回太空的能力，因此它们能够产生十分显著的冷却效果。

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The basic concept is the same as that underpinning the "white roads" idea -- the development of a technology that can reflect a proportion of the sun's radiation away from the earth's surface and back out into space, thereby cooling the atmosphere and slowing, or even reversing the damaging effects of global climate change.

CNN: The shield of Ra: Could solar reflection save the planet?