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1、The reading passage provides three reasons to illustrate the possibility of replace the automobiles by hydrogen-based fuel-cell engine. While the lecture points out that solution is not as good as the passage says.Firstly, the pure hydrogen is not easily to access, since it cannot be produced by wat
2、er directly. And the fuel requires such kind of hydrogen should be a pure liquid state, so it is difficult to produce and store. A complicated and systematic technology is required to produce the hydrogen-based fuel-cell, since it is an artificial product. In the passage, the difficulty of utilize h
3、ydrogen resource is overlooked.Second, the lecture argues hydrogen-based fuel-cell cannot solve the pollution problems. Instead, producing hydrogen caused pollution even more. During the procedures of hydrogen purification, burning water need energy from the fuel or other resources, this will pollut
4、e the environment severely. This kind of pollution is not mentioned by the passage, and the effects should be considered into the placement plan.Finally, against the passage, the lecture also explains the fuel-cell will not be economical. To get a fuel-cell engine, expensive metal is required. So the total cost will not as cheap as they expected. At the end of the lecture, the professor also tells the trials to lower the cost has not been unsuccessful so far.