In Russia, after the global financial crisis in 1998, Russia became a major exporter of grain after 2001.
Not as old as those found in deeper layers
Ocean currents act much like a conveyer belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics.
i can only give an answer to number 1.
land. because most disasters that occur are caused by either air or water. air pollution or flood.