I try to keep it quiet, but I'm pretty green. When you are raised in the city that invented Greenpeace, it's hard to shake the value system.

Sure, I may not subscribe to the earth mother look - the razor is my friend - but I still donate to the World Wildlife Fund, refuse to wear carcass and am seriously anal about recycling. Just ask my poor flatmate; she gets glared at every time she throws paper in the bin.

So imagine my glee at the announcement of international lights-out day. In a bid to remind everyone of the amount of energy we waste every day, environmental groups are asking us to shut off the lights for five minutes between 6:55 and 7:00pm today.