Bio fuels

I see that people are finally waking up to the nonsense which is biofuels. Biofuels are crops which are grown to be converted into a fuel source either as a diesel type liquid for combustion engines or a dry pellet for burning. To grow these crops perfectly good arable land which has been used to grow food crops is being turned over to produce crops to be burned. Where was the sense in that it doesn't reduce CO2 emmissions it just changes the source of the emmisions. It also shows up the rubbish which is spouted by the Global Warming Brigade. If CO2 is causing global warming then why are the GWB content to talk about carbon contracts and trading your carbon quota to someone elses quota, or even buying carbon quotas from third world countries to allow you to produce more CO2. If CO2 is causing global warming, which is very doubtful, then all talk and research should be spent on eliminating CO2 emmisions. But of course it's not it is seen as a nice little earner by both the scientific community and governments of all persuasions. Scientists are being handed money by the truck full to research the problem and governments are taxing everyone in sight for producing carbon whether they do so or not.