When water vapour rises into the air it cools down as it goes higher and turns back into droplets of liquid water. These form clouds. This is the second part of the water cycle – water vapour ...

The sun heats up water on land, in rivers, lakes and seas and turns it into water vapour. The water vapour rises into the air. Rain water runs over the land and collects in lakes or rivers ...

Air pollution over the national capital region and possibly other large cities may be worse than previously estimated, with atmospheric water vapour leading to underestimations of tiny pollutant ...