What was the key driver of irish immigration in 1845?

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

What would be considered a secondary source about the assasination of abraham lincoln

Which subsystem includes the air we breathe