National Science Olympiad Forum By SOF Olympiad Trainer - Page 176
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Pragyan Srivastava from Manipal Public School, Lucknow
Subject :NSO    Class : Class 9

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Manasvi Tiwary from St. Joseph High school panvel, Panvel
Subject :NSO    Class : Class 3

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Vishwas kanani from Apollo international school , AHMEDABAD
Class : Class 4
20 IS ANSWER

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tejashri from Indian Model School, Solapur
Subject :NSO    Class : Class 1

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tejashri from Indian Model School, Solapur
Subject :NSO    Class : Class 1

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Pragun goel from Venkateshwar International School, Delhi
Subject :NSO    Class : Class 8

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Prayaan handel from Billabong high international school, Bhopal
Subject :NSO    Class : Class 3

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Havish jale from CHIREC INTERNATIONAL SCHOOL, Hyderabad
Subject :NSO    Class : Class 2

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rethish from Veltech, Avadi
Subject :NSO    Class : Class 6

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rethish from Veltech, Avadi
Class : Class 3
Air pollution on the road can be reduced by encouraging the use of CNG in vehicles. When used in vehicles as fuel, CNG produces fewer undesirable gases than petrol, diesel or propane. If we increase the number of vehicles on the road, then they will emit more of carbon emissions and smoke. This would cause more air pollution.Deforestation means cutting down trees and forests. Trees absorb harmful carbon dioxide from the air. If trees are cut down, they would not be able to absorb carbon dioxide, so carbon dioxide levels in air would go up. This would cause more air pollution. Hence, Option C is the correct answer.

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rethish from Veltech, Avadi
Subject :NSO    Class : Class 6

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rethish from Veltech, Avadi
Subject :NSO    Class : Class 6

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