The harsher the natural environment, both climate and physical landscape, the more difficult it is to thrive or even survive

What was the first official pair of sister cities?

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

The separation of northern ireland from the republic of ireland is an example of