<span>This
is due to changes in atmospheric chemistry. This is as a result of both natural
and human activities such as industrial emission of gases in one location than
the other or even the quantity of greenhouse gases emitted in the atmosphere.
This may cause differences in average yearly temperature for different
locations. Also, natural changes in the sun which affect the amount of incoming
solar radiation may also be responsible for these differences.</span>
<u><em>SOS:</em></u> Approximately one-half the income in Central America comes from its exports. Half of this trade is with the U.S. and Canada; other trading partners include Europe, Mexico, and South America. The Panama Canal is very important for trade within the region.
A car was invented to run on only water and nothing else so that the air pollution can be decreased because then no smoke would come out of the exhaust.
Wind is the most commonly used term for air movement. It is created when there's two air pressures with different values, the air that has a higher pressure always moves towards the air that has lower pressure, thus creating air movement or wind. Depending on the difference in the air pressure between the two air masses we can have winds that are very strong, standard winds, or very slow winds. The bigger the difference between the air pressures the stronger the wind is, the smaller the difference in air pressures the slower the wind is.
