Going green

On my visit to a friend in Stanford (California) last week, I noted the stress on environmental concerns there. There are special lanes where only cars with more than 2 or 3 passengers can go to encourage people to carpool. Toilets had the signs for paper-rolls "Care for your environment. Take only what you need." I was told that California is probably the state most concerned about environmental issues. Later I came to know that there are carpool lanes in big cities of various states. This concern is certainly a good trend to follow in a country were energy consumption (and wastage) is outrageously high.