<span>Heat energy in warm surface currents is transported to areas near Earth’s poles.</span>
The age of the rocks on ocean trenches and on the adjacent land masses.
I guess an environmental impact of migration MIGHT be that the receiving country obviously will rise in population so it'll have to expand and also use more resources to sustain the extra people. Therefore, more land is urbanized which isn't great for habitats and animals, more land will have to be farmed - loss of animal habitat - and more energy will have to be used to power homes etc.
People may live in an area thats at high risk of hurricanes (etc) for the reason that they have no choice. Or maybe, in a place like Japan where they have the best warning systems and highly developed buildings, it doesnt really matter as much to them. On the other hand, people will live near volcanoes because the soil is much more fertile due to the volcanic ash. This means they can grow more food from the same soil - maybe its a risk worth taking?
If a disaster happens, some may not come back simply because its too dangerous - on the other hand, some might only move temporarily to recover or while their home is rebuilt. Tourists may not come back because it is too dangerous but it will also attract tourists because not everyone can witness a volcano or be in an earthquake.
Lots of land is free from human influence (at the moment) simply because its probably too difficult for us to settle. For example, a desert like the Sahara in Africa is EXTREMELY dry and dangerous. People have been there but it isnt constantly under human influence. Assuming our technology improves and we keep growing in population, maybe everywhere will one day be influenced by humans in some way.
Hope this helps :) <span />
Answer:
Europe is East of the United States.
The smallest country in mainland Africa is The Gambia with a total land area of 10,689 km². It is enveloped by its neighboring country, Senegal.
