Question : Natural sources of air pollution are

Option 1: Forest fires

Option 2: Volcanic eruptions

Option 3: Dust storm

Option 4: Smoke from burning dry leaves

Question : The forests which act as barriers against cyclones are:

Option 1: Alpine forest

Option 2: Mangrove forest

Option 3: Evergreen forest

Option 4: Monsoon forest

Question : The largest forest which covers 25 per cent of the world's forest land is:

Option 1: The Tropical Rain Forest

Option 2: Taiga Forest of Siberia

Option 3: Monsoon Forest

Option 4: Temperate Forests of Europe

Question : Batholiths are landforms created by:

Option 1: groundwater

Option 2: volcanic activities

Option 3: fluvial action

Option 4: glaciers

Question : Which of the following is not a natural source of hydrocarbon?

Option 1: Natural gas

Option 2: Coal

Option 3: Petroleum

Option 4: Mica

Question : How many natural satellites does the planet Venus have?

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 0