Some rather sharp people in Malta created a carbon lottery especially designed to lure people to fighting climate change.  Simple concept too: buy verified offsets for voluntary carbon offset projects, choose numbers as you would on any ordinary lotto ticket, and get entered into the draw for a £4m prize.  Each entry only costs £2.  There is a footprinting tool built into the process, and information on each of the projects worldwide that the funds go towards enabling.  While we personally don't like the idea of lottery, we realise others have a different view.  Seems like a good approach to harness existing behaviour and channel the money towards something useful.  Why try and fight existing behaviours, when a slight tweak could enable them to positive outcomes?