CLASS 9th TO 12th Unseen passage In ENG.A few tips and tricks to solve with exercise Set-3
Read the following passage carefully: Read the following passage carefully 1. Trees are very useful. They supply us with daily conveniences. They help to support man's life by supplying the atmosphere with oxygen which is essential for life. The oxygen in the air is constantly being used up and turned into carbon dioxide when animals breathe and things burn. The green leaves of trees (in fact of all green plants) absorb this carbon dioxide and with the help of sunlight, break it down into carbon and oxygen. The carbon is used to make starch and the oxygen is released into the atmosphere. 2. You must have noticed how, on a hot day, it is often cooler under a tree than inside a building. This is because the leaves of trees breathe out water vapours and they help to cool the air more or less as a mudpot cools the water in it. In this way, forests help to cool the atmosphere and rain clouds passing through it cause rain. Where new forests have been planted, rainfall is known to have in...