Also marking the effort will be the “Speak Up For Nature” campaign to be launched at CentralWorld at 7pm on Saturday.
People can do their bit for the Earth by turning off unnecessary lights in their homes for an hour from 8.30pm to 9.30pm and record their contribution via the #connect2earth, #SpeakUpForNature and #BangkokSustainability hashtags.
Lights will be turned off from 8.30pm for an hour at the Emerald Buddha Temple and Grand Palace; Wat Arun or the Temple of Dawn; Sao Ching Cha or the Giant Swing; Rama VIII Bridge; and the Golden Mount or Wat Saket.
Lights will also be turned off in 126 sites in the city, while the owners of buildings in 100 city streets have also promised to join the campaign.
Bangkok has also invited all sectors to join its efforts to reduce global warming and to cooperate with the city in four areas, namely public transportation, energy, green spaces and waste management.
The City of Angels has been part of the Earth Hour effort since 2008. Last year, one hour of darkness in Bangkok reduced electricity consumption by 2,483 megawatts, thus reducing 1,219 tonnes of carbon dioxide and saving Bt10.15 million.
Since 2008, Bangkok has reduced its carbon footprint by 12,227 tonnes and saved Bt80.87 million in electricity bills.