extreme weather

Biden to hit Trump on climate in Iowa

Photo: Bastiaan Slabbers/NurPhoto via Getty Images

Joe Biden will use a speech in Davenport, Iowa on Tuesday to attack President Trump on climate change during a day that both men are in the state.

Why it matters: The remarks represent Biden's highest-profile attack on Trump on the issue since the early Democratic frontrunner unveiled his climate plan last week. Iowa, like much of the Midwest and Plains, has been hard hit by floods this spring.

'Dead zone' the size of Massachusetts predicted in Gulf of Mexico

A stormy day on Pensacola Beach.
Photo: Carolyn_Davies/Getty Images

The National Oceanic and Atmospheric Administration is predicting this year's annual "dead zone" in the Gulf of Mexico to be unusually large, coming in at "approximately 7,829 square miles, or roughly the size of Massachusetts."

Context: A dead zone is a hypoxic area, meaning that little or no oxygen is present, killing most marine life. NOAA says the event is largely a result of nutrient pollution flowing into the Gulf from the Mississippi River watershed. The surplus of nutrients, such as phosphorous, results in excess algae growth. When decomposed in water, the algae causes oxygen levels to plummet in the ocean's depths.