Study shows fireworks temporarily increase particulate pollution by an average of 42 percent.
On this 45th Earth Day, what better time to take a moment or two admire the wonders of our home.
Since Monday, parts of Maryland and northwest Virginia have experienced compromised air quality in the code orange range.
This year's smaller than average ozone hole is a reflection of weather, not necessarily the healing of the ozone layer.
For the first time since 2009, and only the second time in the last 16 years, Washington, D.C. had zero code red days for unhealthy air quality in the summer of 2013.
Each day, from his perch aboard the International Space Station, Canadian astronaut Chris Hadfield shares front row center views of Earth from outer space.
On this 43rd Earth Day, how about taking a moment to appreciate the planet and our region as seen from space...?
The massive blast from a fertilizer plant in West, Texas imprinted an unmistakable signature underground and in the atmosphere.
Water scarcity is rapidly becoming a significant factor in the way of life in the U.S. Without sufficient foresight and resources for sustainable management of fresh water resources, the problem will become critical in just a decade or two.