Restrictions would be placed on many types of stationary diesel and gas-fired engines under a proposed EPA rule.

Recently released studies show that the problem of ever-increasing GHG emissions in the US could be even worse than the current data indicate, as additional substances are added to the list. A proposed EPA rule may help, if finalized.

Localizing the effects of climate change remains challenging. But a new tool makes it easier to at least pin down the local sources of one of the main greenhouse gases, with the inventory led by Purdue University scientists.

EPA proposes a new rule addressing emissions of toxic chemicals from kilns that are fueled by coal or other typical fuels, or allegedly nonhazardous waste. You'll find this, as well as other environmental story ideas, in the latest issue of TipSheet.

On Aug. 7, 2001, the New England Governors Conference weighed in on the debate over MTBE and ethanol, sending a resolution to Congress asking it to drop rules under the Clean Air Act.

The TipSheet of August 29, 2001, erred in implying that former Ohio EPA chief Donald Schregardus opposed the US-EPA's enforcement initiative against Ohio power plants under the Clean Air Act's New Source Review provisions.

Is the air inside airplane cabins unhealthful? Federal Aviation Administration should undertake rigorous research to better identify problems and solutions.

The closure of U.S. airports following the terrorist attacks of Sept. 11, 2001, provides a rare opportunity to gauge the contributions of airports and related activities to a city's air pollution.

A likely upcoming shift in California's strategy to reduce smog from cars could affect new vehicles rolling onto roads nationwide over the next few years.