A new study threw gas into the flames of climate change debates. Three economists from Stanford University and the University of California (UC) in Berkeley looked into the World Bank data covering 166 countries from years 1960 to 2010. The researchers tracked the relationship between temperature change and productivity levels. The trio identified the best average yearly temperature that matches top productivity levels: 13 degrees Celsius. This is the temperature of San Francisco’s bay area. They found that the world’s largest economies share an average temperature of 13 degrees Celsius, which could be the best temperature where people are effective in ‘producing stuff’.

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