What is perestroika?

a. restructuring of the planned centralized economy,
b. an early move toward a freer market the russian word for railroad improvement of the russian environment greater openness,
c. a policy in the 1980s that encouraged several republics to demand independence a policy of education improvement,
d. in the last days of the former soviet union

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

What is a small water source like a stream or brook?

Based on the information in the graph, what can you conclude about humans in the world in general?