bio-fuel

Recently, we often hear the word "bio-fuel". Do you know this word? Bio fuel is made from corn, sugar cane, woods, oil for food and so on. So I think this materials are near our life, so we can get fuel easily. Bio fuel's good points are these fuels doesn't ezhaust CO2 than pubric car. So it will conect with solution of global warming a little. But this fuel is developing now, it's not completed yet. So we have many problems to solve quickly. That's like high costs to produce bio fuel. People lived in all over the world will want to lower the costs. Now some cars are running to use bio fuel, so I want to come the day when many bio fuels are used as several machine's fuels.