in terms of geography, rome and athens share what similarity in their origins?
a) harbor cities
b) hilltop cities
c) destroyed by volcanic activity
d) centered on major train routes

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