A consumer class action lawsuit filed Tuesday claims Delta Air Lines inaccurately billed itself as the world's "first carbon-neutral airline" and should pay damages. The complaint in federal court in California alleges the airline relied on carbon offsets that were largely bogus.

UPS Chief Corporate Affairs Officer Laura Lane joins All Things Considered host Rickey Bevington to discuss the company’s climate change goals and its environmental, social and governance (ESG) efforts.

People are likely to be confused by common terms such as "mitigation" and "carbon neutral," according to a recent study. How can scientists do a better job communicating about global warming?

The country joins the European Union and other countries that have pledged to reduce their carbon footprint to zero over the next few decades.