NATURAL RESOURCE
Ozone Layer
Global Warming
Greenhouse gases such as carbon dioxide, methane, nitrogen oxide and Chlorofluorocarbons present in atmosphere prevent the escape of heat falling on Earth’s surface rather than absorbing it. This keeps the Earth warm and the phenomenon is known greenhouse effect.
Biogeochemical Cycles
Oxygen Cycle 
Carbon Cycle
Nitrogen Cycle
Water Cycle
Nitrogen an important nutrient for all life forms is circulated through the living and non-living components of the biosphere through various processes like nitrogen fixation, ammonification, nitrification and dentrification.
Green plants release oxygen in the atmosphere which is cycled during burning and combustion .
Water is constantly exchanged between the air, land , sea and between living organisms and their environments by global and biological water cycle .
Carbon is incorporated into life forms by the process of photosynthesis and returns to the atmosphere through respiration , decomposition , combustion , etc .
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Soil
Air
Water
Necessity of Water
The presence of water in a region decides the biodiversity of that area to a great extent .The cellular processes take place in the water-like-medium.A major constituent of blood is water which allows it to carry substances throughout the body.Water helps in regulating the body temperature in animals and human beings.It prevents the tissues, organs and cells from drying out by keeping them moist.
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Water Pollution
Water pollution occurs when harmful substances such as chemicals and waste materials like garbage are present in water that affect its quality and the presence of life in it.
EFFECTS
CAUSES
Waste from Industries
Usage of Fertilizers and Pesticides
Mining Activities
Sewage
Air Pollution
The presence of harmful substances in the air leads to pollution of the air. It can severely affect the health of living organisms and the quality of the environment.
EFFECTS
CAUSES
Harmful diseases and allergies
Exhaust from Industries
Mining
Burning of Fossil Fuels
Suspended Particulate Matter
Indoor Activities
A decrease in the visibility
Acid Rains
It can also lead to an increase in bacteria that causes severe diseases like Cholera.
Water pollution can lead to a decrease in the amount of Oxygen and nutrients in the water which affects the aquatic life.
Addition of unwanted substances such as fertilizers pesticides and industrial wastes can make it poisonous and extremely harmful for consumption.
Water pollution can cause changes in the temperature of water. An increase in temperature is not suitable for all the aquatic animals especially their eggs.
Global Warming
Ozone Layer Depletion
Formation of Soil
Water
Wind
The sun
Living Organisms
Composition of Soil
Soil is a mixture of rock particles , decayed organisms called humus , living organisms , minerals , air and water .
Soil Pollution
The addition of harmful substances which affects the fertility of the soil and kills the diversity of organisms living in it is called soil pollution .
CAUSES
Modern farming practices involve the use of large amounts of fertilizers and pesticides. Use of these substances over long periods of time can destroy the soil structure by killing the soil micro-organisms that recycle nutrients in the soil. It also kills the Earthworms which are instrumental in making the rich humus. Fertile soil can quickly be turned barren if sustainable practices are not followed.
Soil Erosion
The carrying away of soil from one place to the other by flowing water and wind is called destruction .
PREVENTION
CAUSES
Large scale destruction
Overgrazing
Afforestation
Construction of bunds
Vegetative cover on the ground
Terraces
Dams
In the stratosphere, a molecule containing three atoms of oxygen is found with chemical formula of O3 and this is called ozone.
FUNCTION
EFFECTS
CAUSES
The ozone layer shields the entire Earth from much of the harmful ultraviolet radiations that comes from the Sun.
Skin Cancer in human beings
The release of CFCs ,Chlorofluorocarbons