Scientists confirm amassing CO2 heats Earth’s surface
Increase in incoming thermal energy bears signature of greenhouse gas
![Alaska site](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/02/ts_greenhouse_gas_free.png?fit=860%2C460&ssl=1)
WARM UP It may look snowy here, but a rise in atmospheric carbon dioxide directly increased the amount of thermal radiation striking this site near Alaska’s northernmost tip, new research finds.
Jonathan Gero