World Geography
The ozone layer at high altitude contains

only ordinary oxygen (O2)
mixture of atomic oxygen (O), ordinary oxygen (O2) and Ozone (O3)
only ozone (O3)
atomic oxygen (O) and ordinary oxygen (O2)

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World Geography
What is the name given to describe the characteristic warmth of both the atmosphere and surfaces in cities compared to their surroundings?

Urban Heat Island
Out Growths
Urban Agglomeration
Smart City

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