The production of hydrogen to power cars in the United States ...

[iveyjurea]

The production of hydrogen to power cars in the United States requires
 
  A) nearly a million gallons of freshwater each day.
  B) a net input of energy.
  C) fusion reactions typical of nuclear power plants.
  D) fermentation using water and sugars.

Question 2

In hydrothermal vent communities, we would not expect to find
 
  A) carbon compounds.
  B) chemosynthesis.
  C) chlorophyll.
  D) producers.

[T4T]

Answer to Question 1

B

Answer to Question 2

C

[iveyjurea]

Excellent

[chereeb]

Thanks for the timely response, appreciate it