(This is a Underswap rp) Pappy I found some pictures while cleaning your room. and umm they are really, well, disturbing. Are these real??? They look as real as cam be.

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.