Put your tools into the steamer, close the lid on the pot, and put the pot on a flame to boil. After sterilizing tools, let them dry. Do not touch them, or they will not be sterile anymore! Use sterilized tongs, chopsticks, or spoons to pick the tools out of the pot. Move them directly to a sterilized container.
Overall, the global annual temperature has increased at an average rate of 0.07Â°C (0.13Â°F) per decade since 1880 and at an average rate of 0.17Â°C (0.31Â°F) per decade since 1970. [NOAA global analysis for 2016 accessed March 6, 2017].
Although the results for the Earthâs temperature are usually given as anomalies, climate scientists have used the measured temperature data to calculate average temperatures. NOAAâs result for the 20th century average land-ocean Earth surface temperature is 13.9 Â°C. The 2011 NOAA surface temperature anomaly of 0.51 Â°C, gives an average Earth temperature of 14.4 Â°C for 2011. To find out more about how the Earth is warmed and the greenhouse gases that are responsible, see How Atmospheric Warming Works and Greenhouse Gases.