Which of the following has released tge most greenhouse gases over the last 250 years?

automobiles

volcanic eruptions

forest fires

livestock

(either automobiles or forest fires i think)

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