How Climate Change Is Extending Allergy Season For millions of allergy sufferers, the arrival of spring no longer just signals a short period of sneezing
What Is the Ozone Hole? The ozone layer is a protective shield in Earth’s stratosphere that absorbs harmful ultraviolet (UV) radiation from the sun. In
How Climate Change Is Extending Allergy Season For millions of allergy sufferers, the arrival of spring no longer just signals a short period of sneezing and congestion—it marks the beginning
What Is the Ozone Hole? The ozone layer is a protective shield in Earth’s stratosphere that absorbs harmful ultraviolet (UV) radiation from the sun. In the 1980s, scientists discovered that