The most direct evidence of global warming

The environment is getting worse and worse, the weather is getting hotter and hotter, and the holes over the two poles are also getting bigger and bigger. Recently, a researcher finally found the most direct evidence of global warming through in-depth investigation and research. As shown in the figure, our underwear is getting shorter and shorter. The reason is very simple: it's hot. (Please note that the content is purely fictional, and the image comes from Centripetal.)