Can concrete, a major CO2 emitter, be made greener?
After water, concrete is the most consumed substance on the planet and its production is expected to grow from 4.4 billion tons to 5.5 billion tons by 2050. But its production, which involves cement, comes at a huge environmental cost -- accounting for almost eight percent of carbon emissions globally. Mori Rothman reports on the industry’s attempt to reduce concrete’s carbon footprint with cleaner cement.
Climate change threatens Rose Atoll National Wildlife Refuge
One of the biggest impacts of climate change will be on islands and coastal regions. That includes Rose Atoll Marine National Monument, an uninhabited island and protected sanctuary for dozens of wildlife species in the equatorial Pacific’s U.S. territory of American Samoa. Mike Taibbi reports as part of our "Samoan Islands: Shifting Tides" series with Pacific Islanders in Communications support.
Convicted of murder, but a police officer pulled the trigger
In 2015, an Alabama police officer shot and killed a teenager burglarizing a home. While the officer was cleared, four other teens who were involved in the crime were all charged with their friend’s murder. But how can that be? NewsHour’s Megan Thompson reports on the little-known legal doctrine behind the case, called the felony murder rule.
