The dust storms of the great depression are caused primarily a. widespread flooding. b. land left uncultivated for too long. c. fierce westerly winds. d. over-produced land and drought.

Which bibliography entry is written correctly and completely? a. johnson, marie. the solar age. chicago: energy options press, 2014. b. front page story. houston chronicle. 5 apr 2013. c. “will solar work? ” science news. march edition. d. friends of solar. mother earth society, accessed 15 jan 2014.