Any fan of the RTE series, Our House, knows that architect and presenter Duncan Stewart has an encyclopaedic knowledge of equipment to make life easier and greener. One item that caught his eye recently was a totally new concept from Husqvarna - a solar mower. "You just let this thing loose on your lawn - it has a solar collector on its top, is totally silent and causes no pollution. You lay a wire underground around the edges of your lawn and it knows where to stop." The Solar Mower is priced at £2,500 (tel: 01 8486830), and if this is out of your budget Duncan recommends you get a goat.