Because the sapwood of trees contain water, food, salts, air and warmth, wood is often attacked by...
Day: December 9, 2022
In tropical seas many kinds of coral animals and marine organisms such as coral polyps, calcareous algae,...
Lakes are amongst the most varied features of the earth’s surface. They occupy the hollows of the...
An island is a piece of land surrounded on all sides by water. It may occur individually...
A careful examination of the lakes of the world will reveal their immense human significance. In countries...
