What city was the most valuable asset gained in the louisiana purchase

List three reasons why explorers began to explore new, and old areas. [[ps: doesn't explicitly say where. i think it's more in general.

In what year did vladimir lenin and the bolsheviks seize power in russia? 1885 1900 1917 1961

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?