RAYAT SHIKSHAN SANSTHAS SHRIMAN SHETH GANPATRAO SURYAWANSHI VIDYALAYA

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

SUB- GENERAL SCIENCE � STD- 7 th TOPIC- NATURAL RESOURCES

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

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

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

AIR POLLUTION � THE POLLUTION OF AIR IS A MAJOR PROBLEM THAT WE ARE FACING NOWADAYS � THE INCREASE IN THE LEVEL OF CO 2 IN THE ATMOSPHERE BY CUTTING OF TREES � THE INCREASE IN INDUSTRIES CAUSES AIR PULLUTION WHICH ALSO LEDS TO THE GREEN HOUSE EFFECT

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

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

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

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

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

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

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

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 TRENCHES IS CALLED NULLA BUNDING

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

RENEWABLE RESOURCETHE RESOURECES THAT CAN BE PRODUCED AGAIN AND AGAIN ARE CALLED RENEWABLE RESOURCES � Eg. ANIMALS AND PLANTS

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

� THANKS