LIVERPOOL?S best-known landmarks will slip into darkness tonight to highlight climate change.
Buildings across the city will turn off their lights for one hour as part of WWF?s Earth Hour.
Liverpool council is backing the initiative and will be switching off the lights at St George?s Hall, Central Library, Liverpool town hall and Millennium House.
The Three Graces are also expected to be plunged into darkness between 8.30pm and 9.30pm.
Both cathedrals, the ECHO Arena and 30 fire stations have also agreed to the big switch-off.
Officials now hope residents will follow suit by turning off non-essential lights in their own homes.
Cllr Berni Turner, executive member for the environment, said: ?Earth Hour is all about sending out a powerful message.
?We are asking everyone in Liverpool to pledge their support and switch off all non-essential lights. It is really simple and if everyone continues to work together to reduce energy waste, it really will make a huge difference.?
Towns and cities around the world will join the campaign tonight, which aims to be the largest mass global action on climate change ever.
A long-running initiative to illuminate Liverpool?s greatest monuments has seen the majority lit at night for the past few years.
Colin Butfield, head of campaigns at WWF-UK said: ?Our Earth Hour is an inspiring opportunity for people all around the world to do something positive to tackle climate change.
?By switching their lights off, the people of Liverpool will be showing world leaders they care about curbing climate change.?