Greenhouse gases emissions are measured in various units. The most common are kilograms (kg) and metric tons (MT), which are also referred to as metric tonnes, or just tonnes It takes 1000 kg to equal 1 MT. Additionally, while carbon dioxide (CO2) is the most common greenhouse gas, there are others, like methane and nitrous oxide. In order to talk about all emissions combined, scientists often talk of “CO2 equivalent” (CO2e or CO2eq) emissions. While this can be very helpful, it is not straight forward to equate other gases with CO2 and so you may read varying numbers from different sources. For more information, check out this short article in The Guardian. Temperature changes are almost always referred to in degrees Celcius. In some U.S. articles, though, people will refer to Farenheit. For convenience, 1°C is equal to 1.8°F. (1.5°C is 2.7°F and 2°C is 3.6°F.)