Earth Hour is a worldwide movement for the planet initiated by the Australian World Wide Fund for Nature (WWF) in Sydney in 2007. It was started as a lights off event to make stand against climate change.
Since 2011, The International Waterbird Census (IWC) in Serbia is coordinated by Bird Study and Protection Society of Serbia. The IWC is coordinated by Wetlands International and it is organized every year in most countries of the world.
