corn or sugar cane.Plants absorb carbon dioxide as they grow,but growing crops for fuel takes up
wide strips of land.Hydrogen-powered Cars emit no carbon dioxide,but producing hydrogen requires
energy,and if that energy comes from coal-fired power plants，then the problem has not been
solved. The problem with electric cars is that they have typically been limited to a range of tens of
miles as opposed to the hundreds of miles that can be driven on a tank of gas.
Gasoline，it turns out，is an almost ideal fuel(except that it produces carbon dioxide).If it Can
be made OUt of carbon dioxide in the air,the Los Alamos concept may mean there is little reason to
switch,after all.
“It’s definitely worth pursuing，”said Martin I. Hoffert，a professor of physics at New
York University.“It has a couple of pieces to it that are interesting.”Other scientists also said the
proposal looked promising but could not evaluate it fully because the details had not been published.
36. What is most remarkable about the proposal,made by the tWO scientists?。
A.It is given a patriotic name.
B.No law of physics is violated.
C. It is based on existing technology.
D. Carbon dioxide Can be converted into fuel
答案：D
37. What is the biggest problem with hydrogen-powered cars？
A.There is no cheap source of hydrogen.
