The same is true when new air pollution limits take effect. (nrdc.org)
At its worst it can help create seven more days a year when ozone levels exceed air pollution limits. (treehugger.com)
And on April 28, members of the European Union (EU) approved new air pollution limits for large combustion plants that will require utilities to invest in new technology to retrofit coal plants, limit operations to 1,500 hours a year, or shutter facilities by 2021. (powermag.com)