Casey O'Brien

Stories by Casey O'Brien

Plants & AnimalsPlants & Animals

25 endangered animals that only live in America

Feb 28, 2023

EnvironmentEnvironment

Can you solve these real 'Jeopardy!' clues about the oceans?

Dec 11, 2019

EnvironmentEnvironment

54 American cities with dangerous ozone conditions

Nov 18, 2019

WeatherWeather

Fastest-warming states in the US

Oct 22, 2019

EnvironmentEnvironment

The only 7 countries that are on track to meet the Paris Agreement—and how they're doing it

Sep 11, 2019