Which nations produce more of the earths pollution, more developed countries or less developed countries

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?

The creation of the european union has had all of the following effects except

Indicates how many people live in an area