When comparing presidents of the 1800’s to the those of the 1990’s and 200s, modern presidents are more involved in

Draw conclusions  why might a cause like italian unification successfully draw people of very different backgrounds together?  

What effect did the enclosure movement have

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