Throughout September we're bringing you special episodes as we hear from brilliant guests with amazing insider knowledge on how best to save you money. Today we're joined by Molly Lempriere, Policy Editor at news site Carbon Brief. She explains why bills have risen, whether moving to renewable energy sources could see our bills drop, and share tips and advice on how we can improve green credentials of our own homes. Read our 10 tips to reduce your energy bills & sign up to our free sustainability newsletter.