Although loess soils and sediments cover about 1/10 of the earth, approximate what percentage of europe contains loess? 1/2 1/3 1/4 1/5

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

What id the primary human cause of the global warming a. storage of nuclear fuel rods b. burning of fossil fuels c. building of high-density housing d. violent conflicts over natural resources

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic