Why does the air quality get so bad in summer?

When the sun comes out in the summer and temperature soar, the air quality in large cities usually takes a turn for the worse -- especially ozone levels. 

National Pollinator Week: Why we should thank a bug for dinner

This week is National Pollinator Week. It's time to give thanks and reflect on the tireless service that bees, birds, bats, butterflies, moths, flies and many more animals perform every spring and summer. But why?

Lake Mead: Drought-stricken reservoir near Vegas hits new lowest level since 1930s

The water level of Lake Mead, which was created in the 1930s with the completion of the Hoover Dam, continues to fall. It has dropped 180 feet since 1983.

Show Your Stripes Day: How a colorful graphic raises awareness of climate change

Climate Central has created "Warming Stripes" graphics for 179 cities, 49 states and the globe that include available data up to 2021. Here's how you can find one for your city.

California debates listing western Joshua tree as threatened

California officials are weighing whether to list the iconic western Joshua tree as a threatened species, a designation that would make it harder to remove the trees for housing, solar or other development projects.

'Forever chemicals' pose risk even at very low levels, EPA says

The chemicals are found in products like cardboard packaging and carpets. There are also health conditions associated with the chemicals, including cancer.

106 million Americans in 24 states at risk as dangerous heat wave expands

Well-above-average temperatures are expected from the central Rockies across the Plains and into the lower and mid-Mississippi, Tennessee and lower Ohio valleys.

These electric vehicles are cheaper to own than gas ones now

Building electric vehicles is expensive, which is why their prices are high, and it's mostly about the batteries.

Arizona utility regulators reconsider previously rejected expansion of generating station near Coolidge

State utility regulators are reconsidering a previously rejected proposed power plant expansion project that pitted environmental justice concerns against metro Phoenix’s increasing electricity demands during Arizona’s summer heat.