Environmental Science
Which one of the following is the correct percentage of the two green house gases that contribute to the total global warming?

Methane-20%, N2O-18%
CFCs -14%, Methane-20%
CO2-40%,CFCs-30%
N2O-6%, CO2 -86%

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Environmental Science
During the winter solstice in the Northern Hemisphere:

Astronomical winter begins in the Northern Hemisphere
All of these
The noon sun is overhead at 23.5o S latitude
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year

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Environmental Science
The climate of a given region is

its weather
average temperature and precipitation conditions for every day of the year in a given region
average temperature and precipitation conditions
its weather patterns

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