At a paper mill warehouse near the University of Maine, engineer Ian Toal oversees a huge, intricate machine that turns sawdust into a key ingredient for a new kind of heating oil. Researchers at this pilot-scale plant in Old Town, part of UMaine's.
Hooked on heating oil: New wood heat options come with climate trade-offs wgan.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from wgan.com Daily Mail and Mail on Sunday newspapers.
Proponents say heat pumps performed admirably during last week’s cold snap and they are becoming more popular, despite a campaign by the fossil fuel industry to discredit them.