Which spheres are interacting when a volcano erupts and releases gases into the air?

In what three areas is the us leader?

The middle east is especially rich in deposits of

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