Solar energy can, of course, be gathered on Earth, but only about half of the sun's radiation ever makes it to the Earth's surface--the rest is either absorbed by the atmosphere or reflected back by clouds.

FORBES: Galactic Gold Mine?

It was a still afternoon, and billowy white clouds were reflected in the water.

NEWYORKER: Unconventional Crude

He could detect shallower water by colour, and see the light of invisible lagoons reflected in the undersides of clouds.

ECONOMIST: Mau Piailug

But if Svensmark was correct, it would mean that periods of high solar output should coincide with reduced cloud formation (due to reduced cosmic ray incidence), which in turn would have a warming effect on the Earth, since less sunlight would be reflected back into space by clouds.

FORBES: Did CLOUD Just Rain on the Global Warming Parade?