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Information about the video:
On Saturday, March 28, 2009, at 8:30 p.m. local time, 3943 communities in 88 countries of the world joined in the global effort known as "Earth Hour" by turning off lights. The campaign was organized for the third time by the WWF (World Wildlife Fund), to counter the changes to Earth's climate system. Although the phenomenon of human impact on global warming is controversial, we observed active involvement in the action around the world. In Poland the effort was supported by 38 localities which turned off the light in over 280 buildings and structures, as well as by many people in their homes.