How will the development of alternative energy sources affect earth systems?
a.) land and air pollution will be reduced
b.) people will have fewer choices of fuels to power their cars
c.) the geosphere and biosphere
d.) the alternative sources will pollute water and create shortages

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

Describe the characteristics of the nile river and the river’s importance to the people of egypt. write a paragraph of at least 5 complete sentences.

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion