What is the primary function of earth's atmosphere? a)to trap the heat from the sun b)to shield the planet from harmful radiation c)to desintrigate space debris before it reaches the surface d)all of the above which one? only real answers no joke : (

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.

According ti the following map, what are the most common mineral resources found in the united states?

Based on the information in the graph, what can you conclude about humans in the world in general?