__________ is the layer of gases around the Earth.

Factories, vehicles and engines produce_______________.

The warming climate of Earth is releasing a gas called _______ from the permafrost.

The Earth’s temperature has _________ as an effect of global warming.

The power we use at our homes comes from the burning of_________________

The melting of the ice in the arctic region is causing __________ .

took a canoe trip in Canada.. This sentence is missing a __________

Dad giving his colleague the mail.This sentence is missing a /an

My peers at the benches. This sentence is missing ______

The professor corrected.This sentence is missing _____

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