Campus carbon neutrality 11, 1997 and put into practice on February 16, 2005. The protocol targets industrialized countries because they are the ones producing most of the greenhouse gases. Specific chemicals that it wants to reduce are carbon dioxide, methane, nitrous oxide, Sulfur hexafluoride, hydrofluorocarbons, and perfluorocarbons. Thirty-seven industrialized countries and parts of Europe have signed and are bound by the agreement. The United States is not one of them. The Kyoto Protocol allots a specific amount of greenhouse gas emissions that each country can produce, however, countries can also trade emissions with other countries, resulting in the cap and trade system. If
Nitrous oxide aid responders in prehospital settings, given the relative ease and safety of administering 50% nitrous oxide as an analgesic. The rapid reversibility of its effect would also prevent it from precluding diagnosis. Recreational inhalation of nitrous oxide, with the purpose of causing euphoria and/or slight hallucinations, began as a phenomenon for the British upper class in 1799, known as "laughing gas parties". Starting in the nineteenth century, widespread availability of the gas for medical and culinary purposes allowed the recreational use to expand greatly, throughout the world. In the United Kingdom, as of 2014, nitrous oxide was estimated to be