How has the water turbine changed the world?

In the late 1990s, brazil’s poor people protested about crowded cities land distribution mining permits industrial pollution

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.

Why might it be important for eu countries to share borders?