Dave LaFontaine via Flickr

The Environmental Protection Agency is finalizing stricter limits on ground-level ozone, which the agency says is harmful to human health. That has some manufacturers in New Mexico concerned that the new rule will increase the cost of doing business.

Greg Lundeen / NOAA/CreativeCommons

The journal Science has just published a new study from scientists at Harvard University showing how a rise in global temperatures is helping to destroy the ozone layer.