To a little extent, the United Nations was effective in promoting international cooperation in environmental protection in the second half of the 20th century. In 1972, the UN Conference on the Human Environment was held. It was the first time that nations had met to consider the global environment and development needs. Since then, the world leaders showed intention to hold a similar meeting every ten years. In 1992, the UN Conference on Environment and Development was held. The international community also reached a number of declarations and treaties about environmental protection. In short, the UN was effective to consider global environment and development needs. The United Nations was effective in making attempts to combat global warming. Over 160 countries met in a conference which held by the UN in Kyoto in 1997. It discussed the problem of the climate change and negotiates binding the limitations on emissions of greenhouse gas. By the Kyoto Protocol, developed nations agreed to limit the emissions of greenhouse gas. The UNEP was set up in 1972; it aimed to highlight the damage caused to the ozone Layer. In 1987, there was an effort in reducing chemical emission of substance causing the depletion of the ozone layer through the Montreal Protocol. It also led a major effort to clean up the Mediterranean Sea. On the other hand, more than 50% of the polluted beaches are now usable as a result of rival countries such as Syria and Israel working together to clean up. Moreover, the UN Conference on Environment and Development was held in Brazil in 1992. All 179 participating countries adopted the agenda agreed in the conference on restricting harmful pollutants to promote sustainable development. Therefore, the UN was effective to lead the world to solve pollution problems. To preserve world’s resources, the UN set up the United Nations Convention on the Law of the Sea which gives countries economic control over their coastal regio