1. RAYAT SHIKSHAN SANSTHA’S
SHRIMAN SHETH GANPATRAO SURYAWANSHI VIDYALAYA TAMBAVE TAL. PHALTAN DIST SATARA

2. SUB- GENERAL SCIENCE
STD- 7th
TOPIC- NATURAL RESOURCES

3. ALL RESOURSES CAN BE CLASSIFIED INTO
1] NON RENEWABLE RESOURCES
2] RENEWABLE RESOURCES

4. NON RENEWABLE RESOURCES THE RESOURCES THAT CAN NOT BE PRODUCED BY ANY METHOD ARE CALLED NON RENEWABLE RESOURCE
AIR, WATER, SOIL AND MINERALS THESE ARE NON RENEWABLE RESOURCES

5. AIR- A NATURAL RESOURCE
AIR IS CONSISTS OF MAINLY NITROGEN,
OXYGEN, CARBON DIOXIDE, WATER VAPOUR AND SOME OTHER GASES

7. AIR POLLUTION
THE POLLUTION OF AIR IS A MAJOR PROBLEM THAT WE ARE FACING NOWADAYS
THE INCREASE IN THE LEVEL OF CO2 IN THE ATMOSPHERE BY CUTTING OF TREES
THE INCREASE IN INDUSTRIES CAUSES AIR PULLUTION WHICH ALSO LEDS TO THE GREEN HOUSE EFFECT

8. HOW TO OVERCOME AIR POLLUTION ?
1] PLANTING OF TREE
2] USE OF FUEL LIKE CNG RATHER THAN PETROL OR DIESEL
3] PUC OF VEHICLES IS DONE WHENEVER IT IS NECESSARY

9. WATER POLLUTION
IT IS SAID THAT WATER IS LIFE BUT MOST OF THE RESERVOIRS OF THE WATER IS GETTING POLLUTED TODAY

11. POINTS TO REMEMBER WATER IS A NON RENEWABLE RESOURCE
THERE ARE ONLY LIMITED RESERVES OF WATER
THE AVAILABLE RESERVES ARE GETTING POLLUTED

12. HOW TO OVERCOME WATER POLLUTION ?
DON’T USE CHEMICAL FERTILIZERS FOR GROWING CROPS
TREAT POLLUTED WATER, CHEMICALS AND SLAG FROM FACTORIES
DON’T POLLUTE WATER BY BATHING, WASHING OF CLOTHES INTO THE RIVER

13. SOIL IT REQUIRES THOUSANDS OF YEAR TO FORM A 1cm THICK LAYER OF SOIL
HENCE IT IS CALLED AS A NON RENEWABLE RESOURCE

14. SOIL POLLUTION- REASONS
OVERUSE OF CHEMICAL FERTILIZERS FOR GROWING CROPS
RELEASE OF POLLUTED WATER, CHEMICALS AND SLAG FROM FACTORIES INTO THE SOIL
OVERUSE OF INSECTICIDES SPRAYED ON THE SOIL
OVERUSE OF WATER

15. MEASURES FOR PROTECTING SOIL
PLANTING TREES
USING ORGANIC FERTILEZERS
USING ORGANIC INSECTICIDE
PREVENTING THE CUTTING DOWN OF TREES

16. NULLA BUNDING
IF LATERAL TRENCHES ARE DUG ACROSS AT REGULAR INTERVALS ACROSS SLOPING GROUND, THE FLOWING RAINWATER COLLECTS IN THE TRENCHES AND SEEPS INTO THE SOIL. AT THE SAME TIME, THE SOIL FLOWING WITH THE WATER IS ALSO COLLECED IN THE IN THE TRENCHES IS CALLED NULLA BUNDING

17. MINERALS MINERALS ARE THE NON RENEWABLE RESOURCES
THE MINISTRY IF INDIA FOR RENEWABLE ENERGY OF THE GOVT. OF INDIA OBSERVES 20th AUGUST AS AKSHAYYA URJA DIN

18. RENEWABLE RESOURCE- THE RESOURECES THAT CAN BE PRODUCED AGAIN AND AGAIN ARE CALLED RENEWABLE RESOURCES
Eg. ANIMALS AND PLANTS

19. BIOTECHNOLOGY
IT IS POSSIBLE TO GROW ANY PLANT WE WANT IN THE TEST TUBE IN A LABORATORY
IT IS ALSO POSSIBLE TO TRANSFER SPECIFIC GENES FROM ONE PLANT TO ANOTHER AND DEVELOPE THE NEW VARIETIES
NOW LIKE PLANTS, ANIMALS TOO, CAN BE PRODUCED IN THE LABORATORIES. THIS IS CALLED BIOTECHNOLOGY

20. THANKS