If you find the summer heat hard to take, cities are the worst places to be. Studies show that urban spaces can be up to three degrees hotter than surrounding areas. That's because of the "heat island effect"--which is what you get from paving every available surface with heat-absorbing asphalt and concrete.
Using a thermal camera, these graphics by artist-researcher Nickolay Lamm explain how a city gets hot and stays hot.
Via Lauren Moss