Business Green: The US biodiesel industry was celebrating this week after the Senate approved the extension of the controversial $1 (66p) a gallon tax credit that had been allowed to expire at the end of last year. The one-year extension of the tax credit, which will retroactively cover biodiesel produce since the turn of the year, was passed as part of the new jobs bill. The bill will still need to be reconciled with a similar bill passed by the House of Representatives and there is no set …