Place the following events in sequence: A) The world population reaches 6 billion; B) The Industrial
Revolution begins; C) People begin packaging things
in plastic
А С, В, А
В
А, С, В
В, А, С
DB, C, А

How does population distribution reflect a particular region’s economy?

Volcanic irruption is most likely to be violent when a) volcanoes near to the sea b) the neck of the volcano is sealed by a plug c) the lava is viscous d) the lava reaches the surface through a fissure e) the volcano is on the ocean floor

What was the first official pair of sister cities?