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He had horses at least since there were no cars then. Since he has horses, most likely there were barn cats.
Carbon
No. Although cars had been around for some years, most people still had horses and they were used in the same way that they always had. At the beginning of the 20th century cars were more or less toys for the wealthy. Most of the middle class still used horses.
In order to know what species would be affected by change one needs to know the type of change you are referencing.
Most people in the Sahel travel on foot, on horses, camels, planes, boats, and cars.
Tidal forces on earth
gas phase
Unlike salt, potassium nitrate's chemical solubility is most affected by a change in temperature. Potassium nitrate is a chemical compound.
Most people in the Sahel travel on foot, on horses, camels, planes, boats, and cars.
On most cars, yes.
living things in the biosphere
\ follow top radiator hose to engine on most cars