Environment & Ecology · Environment

With reference to the U.S. Environmental Protection Agency (EPA) and the landmark 'endangerment finding' on greenhouse gases, consider the following statements: I. The 'endangerment finding' was triggered by the U.S. Supreme Court's judgment in Massachusetts v. EPA (2007), which recognized greenhouse gases as air pollutants under the Clean Air Act. II. The U.S. EPA concluded in 2009 that major greenhouse gases such as carbon dioxide and methane endanger public health and welfare. III. The legal existence of the 'endangerment finding' has no implications for the EPA's authority to regulate emissions from the transport sector. IV. U.S. fuel economy and vehicle emission standards historically influenced global automobile technology shifts, including the adoption of hybrids and electric vehicles. Which of the above statements are correct?