As the demand for transportation fuels has plummeted at an unprecedented rate in the last month due to the COVID-19 pandemic, a Northern Arizona University scientist says the dramatic decrease in local air pollution and carbon dioxide (CO2) levels above cities is significant, measurable and could be historic, depending on how long commuters and other drivers stay… Read more
As Arctic tundra has warmed more than twice as fast as the rest of the planet in… Read more
As the threat of global warming grows—and with it, the specter of more extreme conditions such as wildfires, droughts and tropical storms—cities across the U.S. are developing policies to reduce their emissions of greenhouse gases, chiefly carbon dioxide (CO2). Even though many local governments are committed to these goals, however, the emissions data they have to… Read more
According to a new study, global warming began in the Arctic and tropical oceans before thermometers were widespread enough to record the early signal.
Northern Arizona University’s Darrell Kaufman, Regents’ professor, and Nicholas McKay, assistant professor, along with scientists from around the world, recently discovered that human-caused global warming began in the mid-1800s.
Unlike the previous research that relied mostly on instrumental temperature records, McKay and Kaufman,… Read more