What ‘Code Purple’ and Other Air Quality Terms Mean
If you haven’t paid attention to the air quality index until now, you’re probably learning a lot about it rather quickly. Philadelphia and Washington, D.C. are under an air quality…
What the UV Index Actually Means
We get sunlight every day, but some days the ultraviolet rays are stronger than others. You know this intuitively if you’re prone to burning: You probably skip the sunscreen if…
Find Out If You Live in One of the Most Polluted US Cities
There’s a tiny bit of good news in the American Lung Association’s “State of the Air” report: Only 36% of us live in places that get an F grade for…
What Does Space Smell Like?
Photo: Elena11 (Shutterstock) There is much to ponder in the infinite mysteries of outer space, but…what’s it smell like? It turns out that much, if not all, of the seeing…
Record-breaking hole in ozone layer over Arctic closed: EU sat
In a good news, European satellite system Copernicus has found that a record-breaking hole ever observed in the ozone layer over Arctic has closed. In late March, scientists had spotted…