Did you know that running a petrol lawnmower for an hour can create the same carbon emissions as driving a car for 93 miles? Or that using peat-free compost in your garden is a great way to save wildlife and cut your carbon footprint? This week's show is all about the ways we can all make a difference on our doorstep. Featuring Catherine Cutler from The Eden Project, author Sally Nex and no-dig gardening guru Charles Dowding. Plus the latest in our series celebrating the unsung heroes of horticulture: the inspirational story of George Washington Carver; born a slave, he overcame overwhelming obstacles to become one of the most eminent and forward-thinking scientists of his day.