"In hotels, switch off lights and re-use linens, " advises Chan.

BBC: Sustainable travel in Malaysia

The Kremlin due to switch off its lights at 16:30 GMT along with 90 other landmark buildings in Moscow.

BBC: Sydney dims down for Earth Hour climate change protest

It encourages cities and individuals to switch off non-essential lights for an hour at 20:30 local time.

BBC: Sydney dims down for Earth Hour climate change protest

Many authorities are trialing a switch-off of street lights at night, including Somerset and Wiltshire, but some have decided to turn them back on, including Milton Keynes, following a 30% rise in accidents and two deaths in unlit areas.

BBC: Councillor Robert Gould, from Dorset County Council

The street lights switch-off will be rolled out across the rest of Dorset in the next year.

BBC: Swanage street lights switch-off to save ?150,000 a year

The lights in Swanage will be programmed to switch off between 00:00 GMT and 05:30 GMT from April.

BBC: Swanage street lights switch-off to save ?150,000 a year

With a mechanical keyboard, on the other hand, each key press triggers an actual on-off switch a feeling as solid as flicking on the lights.

WSJ: Keys That Really Click

Some residents in Dorset are calling on the county council to turn street lights back on at night time claiming the current switch-off is "dangerous".

BBC: Councillor Robert Gould, from Dorset County Council

Low cost improvements can include replacing incandescent lights with CFL or LED alternatives, master switches to make it easier to switch off appliances at night, energy monitoring to make it easier to identify waste, draft proofing, and using plants or shade-cloth to keep the summer sun off your home.

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At present the county council runs 45, 000 lights and so far 14 parish councils have expressed an interest in taking part in the switch-off.

BBC: Somerset street lamp plan 'could save council ?120,000'