Strategies to improve water quality in the region include:

building dams

improving irrigation techniques

urbanization

reusing waste water

salinization

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Select the word from the list that best fits the definition a mountain range in northeast central asia answer is altay shan

The first atomic explosion was detonated in the desert north of alamogordo, new mexico, on july 16, 1945. what percentage of the strontium-90 ( yr) originally produced by that explosion still remains as of july 16, 2016?