Approximately what percent of the United States' electricity is provided by nuclear energy? O 5 percent
O 10 percent
O 15 percent
O 20 percent

Write a 150-word essay describing the effect of people's activities on the environment in the region.

Geologists know that potassium-40 decays to argon-40, with a half-life of 1.3 billion years. if an analysis of a feldspar crystal in a sample of granite shows that 75 percent of the potassium-40 atoms have decayed to form argon-40, what is the age of the granite

Which country is currently the most populated country in the world? a. india b. china c. mongolia d. indonesia