Whether you're a serious athlete or a recreational cyclist or runner, it's but prudent to educate yourself about whether working out in polluted areas causes damage to your lungs and your health overall.
How successful are EPA rules? The report found that for every dollar we spend on environmental and health protections, we get back ten dollars in health, environmental, and economic benefits that add up to make all of our lives richer.
Climate change -- and the hotter temperatures that come with it -- only make smog worse. For children, the elderly, outdoor workers, and those without health insurance in the Hispanic community, these conditions can be deadly.
International aviation is on course for a rough landing in our warming world. Air travel is growing rapidly -- and so are aviation emissions, which are already responsible for 5 percent of the warming effect of global greenhouse gas emissions.