Conservation of Environment

• Biodegradable wastes-
  • Wastes that can be broken down by biological processes are called Biodegradable.
  • They are mainly produced mainly from plant and animal sources.

• Non-biodegradable wastes
  • Wastes that cannot be broken by biological processes.
  • They are usually man-made like plastic, metal etc.

• Water is essential for life.
• About 71% of the earth’s surface is covered with water. It is present as ground water, in seas, oceans, rivers, lakes, ice caps, and in atmosphere.
• Wells, rivers, ground water reservoirs or lakes are sources of fresh water.
• Ocean and sea water is not potable because they contain large amount of dissolved salts.
• Water is a necessity for every form of life. It is used for domestic activities, irr…