New Generation IV nuclear plants such as the pebble-bed nuclear ...

[jeatrice]

New Generation IV nuclear plants such as the pebble-bed nuclear reactor features
 
  A) a combination of nuclear fusion and fission in a single design.
  B) cooling with liquid helium, smaller scale and less nuclear fuel in the reaction chamber.
  C) a design that uses a mechanical source of X-rays for power.
  D) designs based on the Fukushima Daiichi plant in Japan.

Question 2

The natural modes of nitrogen fixation are
 
  A) various industrial processes of making fertilizers.
  B) fossil fuel combustion.
  C) lightning and bacterial fixation in soils.
  D) denitrification and various industrial processes.

[paavo]

Answer to Question 1

B

Answer to Question 2

C