But for sustained use, these reactions would need to take place at temperatures above ambient conditions as heat is produced. (sciencedaily.com)
Since 1912, states with average winter temperatures below 32 °F have warmed three times faster than states with average temperatures above 32 °F. (wxshift.com)
Figure 1: Global temperatures from models are calculated using air temperatures above the land surface and also from the upper few meters of the ocean. (niskanencenter.org)