A kind of fuel

A kind of fuel--ethanol fuel make from some plantshas been advocated as an alternative to gasline in U.S.Some support this and some opposite it. Though according to the reading material that ethanol fuel will warm the world by releasing carbon dioxide, the professer piont out that this ideal is unconvincing because carbon dioxide helps to grow more planets which can change carbon dioxide into another useful form. So the carbon dioxide will not add to global warm. Ulike the reading material think that for product ethanol fuel, most of corn for feeding animals will be used and no more forage for animals, the professor opposite this. In his lecture, professor said taht not all plants can be eaten to animals and there are always some special planets is available to make ethanol fuel which are not required by animals. So food crisis will never appear. The last point the reading material aggainst is that the price of ethanol is much higher than gasoline. Different with the reading material, the profesor thought that with the product increasing, the price of ethanol fuel will down and then ethanol fuel will be competitive.