The document provides a timeline of key events in environmental science and policy from 1798 to 2011. It includes the predictions of Malthus on population growth outpacing food production leading to starvation, the founding of Yellowstone National Park as the first national park, and major pollution events like the London Fog, Donora disaster, and Cuyahoga River fire that helped spur the environmental movement. Key milestones in environmental policy are also noted, such as the founding of the Sierra Club, establishment of the EPA and major acts like the Clean Air and Clean Water Acts.