Carbon pricing is a policy tool that charges emitters for their greenhouse gas (GHG) emissions, shifting the climate-related costs (e.g., health issues, property damage) from the public back to the source. It provides a financial incentive to reduce emissions and invest in cleaner technology, typically using carbon taxes or cap-and-trade systems.
Play Time: 1:57

Earth's global surface temperatures in 2017 were the second warmest since modern record-keeping began in 1880, according to an analysis by NASA. Continuing the planet's long-term warming trend, globally averaged temperatures in 2017 were 1.62 degrees Fahrenheit (0.90 degrees Celsius) warmer than the 1951 to 1980 mean, according to scientists at NASA's Goddard Institute for Space Studies (GISS) in New York. That is second only to global temperatures in 2016. Last year was the third consecutive year in which temperatures were more than 1.8 degrees Fahrenheit (1 degree Celsius) above late nineteenth-century levels. NASA's temperature analyses incorporate surface temperature measurements from 6,300 weather stations, ship- and buoy-based observations of sea surface temperatures, and temperature measurements from Antarctic research stations.
Play Time: 0:36

Temperature anomalies by country 1880-2017 based on NASA GISTEMP data. The main metric we use to track global warming is the temperature anomaly. This doesn't tell us the absolute temperature in a given month, but how different it is compared to historical temperatures. In climate research, temperature anomalies are considered a key metric since they tell us about changes over time.
Play Time: 0:36

Global warming could create 150,000,000 "climate refugees" over the next 40 years. Here are the five cities most at risk, and the surprising relationship they have with the most resilient cities on the planet.
Play Time: 1:52