Fuel cells are highly efficient power generating systems that produce electricity. Which of the following statements about fuel cells is false?
A) The only waste product from a fuel cell is water.
B) Fuel cells are not a good transition product from fossil fuels to renewable energy.
C) Fuel cells are efficient based on size and energy output.
D) Fuel cells can be used in automobiles, homes, and power plants.
E) Fuel cells can be used to store large amounts of energy.

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.

Why is the limitations on supplies of freshwater becoming an increasing problem despite the fact that we have desalination technologies