It was exactly 50 years ago that the idea of World Environment Day was conceived. In 1972, Sweden hosted the United Nations Conference on the Human Environment, which identified and discussed environmental preservation as a seminal issue, for the first time. The Conference is considered the first global environmental summit. A year later, in 1973, the world celebrated its first World Environment Day on June 5th. From thereon, this day dedicated to planet Earth, has been attempting to highlight our ecology and threats to its existence.