The following question refers to “The Next Green Revolution”:
What conclusion can you draw from the statement, “The challenge is to scale up these technologies to deliver power in industrial quantities…”?
A.These technologies still need to be improved to be safe for the environment.
B.These technologies are not yet available in amounts we need.
C.People should immediately switch to new technologies, such as wind turbines.
D.These technologies are cheaper than traditional energy sources, such as oil.