Ozone formation and destruction are powered by

Majority of UV rays are screened out by

Which of following comes mainly due to combustion of fuel used in motor vehicles?

Which of following is Third layer of atmosphere as one moves upwards from Earth's surface?

PH of normal rain water is

Approximately, what percentage of water vapour is contained by air in tropical rain forest?

Which of following is true about nitric oxide?

Presence of which of following can be felt near photocopier, television set, microwave oven etc?

Extension of troposphere above Earth's surface is

Energy of sunlight is converted into heat by

Height of mesosphere is

Percentage of methane in air is

Which of following is first layer of atmosphere as one moves upwards from Earth's surface?h