One statement in each group is the point of an argument. The other statements are support for that point.
a. The benefits of nuclear energy are significant, but so are the risks.
b. Today, nuclear power plants generate about 17 percent of the world's electricity.
c. In 1986, an accident at the nuclear power plant in Chernobyl in the Ukraine released deadly radiation and forced the evacuation and resettlement of 200,000 people.
d. Nuclear energy generates "high-level" radioactive waste that will be unsafe to release into the outside environment for thousands of years.