There is global warming because of increased CO2 and Methane in the atmosphere. The CO2 is mostly from emissions from cars and such. The Methane is mostly from cows, meaning beef and dairy. This gets trapped in our atmosphere, letting heat warm the earth but it traps the heat. This leads to an increase in temperature.
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i don't understand sorry ;(
good luck
Explanation:
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<em>A 'large' scale map is one in which a given part of the Earth is represented by a large area on the map. ... A 'small' scale map is one in which a given part of the Earth is represented by a small area on the map. Small scale maps generally show less detail than large scale maps, but cover large parts of the Earth.</em>
