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It has been a barrier to trade
No. Topography is not alive and has never been. It is an Abiotic Factor.
most of the countries in Africa have a subtropical climate. i think you got the question wrong... I think the question would have been which two countries do NOT have subtropical climates...:)
It has caused foreign company's to invest in them
There has been a decline in economic productivity in countries affected by AIDS.
Glaciation, Ice Ages. The Shield has been stripped bare and scoured by the movements of huge sheets of ice the result of climate cooling and warming over thousands of years.
In Africa there are scratch marks that could only have been caused by glaciers but Africa is by a hot place by the equate so once it was colder there
In Africa there are scratch marks that could only have been caused by glaciers but Africa is by a hot place by the equate so once it was colder there
most regions do not have limestone under the soil Most regions have rock layers other than limestone
"Latitude" is a purely human invention, and has only been around for a few hundred years. No point on earth knows or cares how we define or describe its latitude, and its latitude has no effect on its climate. Long before latitude was invented and Miami's had been measured, the climate there was exactly the same as it is now.
wave pulses
The supposed theory is that humans have been accelerating global climate change since the 1800s (slightly over 200 years). Some say we have GREATLY impacted global climate and desperately need alternative energy sources before we cause a "runaway greenhouse effect". Some believe that humans have little to NO impact on the climate. My personal belief is that the arithmetic prevails. I do not believe that 200 years is enough time for heavy industry to effect the planets climate.