▶ Your Answer : While the author makes an assertion that biofuels bring about three problems, the lecturer opposes that the points presented in the reading passage are not true.
First, the speaker points out that it is not true that biofuels cause a serious food shortage. According to the reading, last year half of the corn production were used as producing biofuels, which leads to food shortage, but the speaker says it is not true. Corns were used just five percent of total production, so it cannot be related to food shortage.
Additionally, the lecturer argues that even though the price of food sources related to biofuels could be increased, transportation fee will be much cheaper because biofuels are much cheaper than gasoline. Since transportation fee will be decreased, the price of other crops will be much cheaper. Therefore, biofuels are actually helpful for households and countries. However, in the reading, the result of the first paragraph's argument, the price of food will be increased due to food shortage.
Finally, the professor contends that biofuels make people healthy. Since many farmers grow only crops related to generating biofuels, they raise less livestocks than before. Thus, people will eat less meat than before, so they can consume healthier foods. This goes against the author's assertion that biofuels will have a bad influence on people's health.
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