For those who don't know what a pressure cooker is, it is a cooking device that has a pot and a lid. The lid is secured on the top and has a gasket that makes it air tight. At the top is a valve that lets out steam so that there is not too much pressure inside and there is a safety valve too to serve as a secondary outlet for steam in case the primary one gets blocked. I never saw anyone using it in Australia and I know anyone going from India generally takes one with them since they are not commonly available in "developed" countries. The developed countries that are the biggest contributors to pollution and consume the highest of energy should seriously consider pressure cookers and other small things that can go a long way in makeing this planet a better place.