In 2009 hundreds of millions of people around the world showed their support by turning off their lights for one hour.

Earth Hour 2010 will continue to be a global call to action to every individual, every business and every community. A call to stand up, to show leadership and be responsible for our future.

Support Earth Hour and turn off your lights for one hour, Earth Hour, 8.30pm, Saturday 27th March 2010.

Once you have seen the light on March 27, why not make every hour Earth Hour?

Ever wondered how much difference your small actions can make? If every New Zealand household took these three simple actions, it could have a big impact on energy saving, and on reducing our greenhouse gas emissions;

Turn un-needed appliances off at the wall: when not in use things like heated towel rails and appliances on standby account for almost 1 billion kWh of electricity per year or 165,700 tonnes of CO2 equivalent. If every household simply turned these off, we could make a big saving.

Go car-free one day a week: Transport is a major contributor to NZ's emissions (20%). If everyone in NZ who currently drives to work were to walk, cycle or take public transport on just one day per week, it would save up to 114,000 tonnes of CO2 equivalent per year.

Switch your bulbs: If every household swapped their remaining old-style light bulbs for new energy efficient ones, this could save up to 0.6 billion kWh of electricity or 106,800 tonnes of CO2 equivalent per year.

The combined impact of these actions would be an emissions reduction of 386,500 tonnes CO2 equivalent per year. This is equivalent to over 839,000 car journeys from Kaitaia to Invercargill. It would take 128,400 hectares of regenerating native forest one year to absorb this much carbon dioxide. This is an area twice the size of Auckland.

Figures are based on work by Landcare Research's carboNZero Programme in December 2008 commissioned by WWF-New Zealand.