Why might scientists and engineers want to find out if a system like biosphere 2 can sustain life

Which of the following was not a factor that contributed to world war i? a. american neutrality b. nationalism in the balkans c. the system of overlapping military alliances among different european nations d. the rise of germany as an imperial power

Interest groups and political action committees are both types of organizations that

When the communist, under mao, took control of china in 1949 they announced total support support for which country and its ideology?