How do rivers in South Asia help sustain life in this subcontinent?

Explain the value of statistics and other data to positive economics and to normative economics

The biome that includes evergreen trees is the forest biome.

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?