Magma from a reservoir deep in the Earths crust rises to the surface.
Answer:
The Gilded Age was a period in American history In which a chunk of its citizens were made wealthy . This gave rise to the people called the robber barons who became wealthy as a result of their monopoly on some sectors of the economy and became an integral part of society. Some examples of robber barons include John D. Rockefeller, Andrew Carnegie, and JP Morgan.
They were known to live a very lavish lifestyle due to their fortunes.
The demographic blow to Eurasian population that has as consequence effect on climate greater than deforestation, this hypothesis is based on the assumption that some events led to abrupt demographic changes that led to the abandonment of cultivated lands in which vegetation grew again and absorbed more carbon dioxide.