What do you think historians do?

How does cloud cover affect how much infrared light is reflected back to the ground?

Why do drivers have difficulty seeing side traffic at t-intersections in rural areas?

In the years after world war ii, which of the following caused many people from asian and african countries to migrate to europe? a. the end of the soviet union b. new economic opportunities after colonialism ended c. the religious freedom found in europe d. new laws allowing greater numbers of immigrants into european countries