The Nile River . has its headwaters in the desert is ephemeral is in Europe is building a huge sand delta is without major tributaries in the desert

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

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

Afarmer who is grown corn for the past five years notices in the sixth year that the his harvest is significantly smaller, despite an increase in labor on the farm. the following year, the harvest continue to decline. which of the following explanations most plausibly accounts for the reduction in corn yield? a) soil degradation b) desalinization c) better irrigationd) terracing