Why Are There Clouds?

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If we wanted to make a cloud entirely from scratch, we’d first need a fleet of jumbojets or several hundred hot-air balloons to haul hundreds of tons of water up to the sky.And then, somehow, we’d need to disperse all that liquid into a mist of droplets smallenough to float. In short, it wouldn’t be easy. And yet,our atmosphere manages to pump out one cloud after another all over the world at altitudesof up to 20 kilometers above sea level, using water and fuel carried all the way from Earth’ssurface. Cumulus clouds, for example get their startwhen solar energy evaporates water from oceans, plants, and soil by breaking the bonds thathold water molecules together. As the patch of air above collects moisture and heat cooler,heavier air sinks around it pinching it of...
Why Are There Clouds?
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