Can yall help me please? URGENT, brainliest award! (don't answer if you don't know pls) The land gained in the Mexican-American war caused the nation to debate or argue over this major issue.

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste