People begin to hate each other when they are too cold or too hot.

Temperatures below +12 °C and above +21 °C can have a negative impact on the psyche and provoke aggression in social networks. Scientists analyzed 4 billion tweets written by Americans in 2014-2020. Artificial intelligence compared the presence of hate speech in the post with the temperature outside the window. The least aggressive tweets were written at temperatures between +15°C and +18°C. When it was warmer than +30 °C outside, there was much more hatred on the Internet: in all climatic zones and social communities.