What river in africa was essentially used as a highway to transport gold and salt

What first caused people to consider that the continents were once one large landmass?

Read the following quote from the nature conservancy, “the 3 billion people who live in poverty around the world will be hardest hit by climate change. the poor are more dependent on natural resources and have less of an ability to adapt to a changing climate. diseases, declining crop yields, and natural disasters are just a few of the impacts of climate change that could devastate the world’s most vulnerable communities.” from this quote, what group of people is most vulnerable to climate change? those who depend on industrialized nations people who are able to adapt to changing conditions people living in central america people who are living in poverty

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal