How do bodies of water and river systems affect human activities in the eastern meditterian

Which element about russia in 1990s in not accurate

Which is a result of the emission from the use of fossil fuel

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks