Vermont firm to workers: Save energy, earn bonus

A manufacturer of renewable energy equipment has found a formula to get its employees to save energy: a $6,000 annual bonus, offset with a carbon tax.

David Blittersdorf, CEO at AllEarth Renewables, said he has long tried to walk the talk as a maker of renewable energy equipment. In 2011, he proposed a car tax on his 31 employees, but some balked and helped brainstorm another solution.