Methane concentrations in Earth’s atmosphere increased at record speed over the past five years. At least two-thirds of annual methane emissions now come from human activities, including fossil fuel use, agriculture, and landfills and other waste.

Soil-packed floors common in rural, low-income households in developing countries are breeding grounds for intestinal diseases. Stanford epidemiologists and engineers are developing a lower-emission concrete flooring that could improve families’ well-being with less environmental impact.

Researchers at Stanford and Colorado State University used machine learning to determine how much global warming has influenced extreme weather events in the U.S. and elsewhere in recent years. Their approach could change how scientists study and predict the impact of climate change on extreme weather.