Memories of the 28th Century

It has been known for a fairly long time that clouds are made of water in the form of vapor and small droplets. It is also well-known that clouds reflect solar radiation away from Earth. It is also well-known that water vapor is the main "greenhouse" gas in the Earth's atmosphere; in addition to being more effective in holding infrared radiation; it is also one of the more common components of the atmosphere, usually the third most common component after nitrogen and oxygen.
...