> This is the first I've heard of ethanol being useful for reducing emissions. Why would the EPA be involved, if not for emissions reasons? The argument about

> This is the first I've heard of ethanol being useful for reducing emissions. Why would the EPA be involved, if not for emissions reasons? The argument about net-zero or negative energy life-cycle return isn't what is meant by "emissions". In automobiles the exhaust pipe is considered a point source, not the combined sum of the production process including a tractor being run a thousand miles away from downtown LA or Houston.