You body temperature is about 300 degrees Kelvin. 10,000 nanometers is infrared light. Rattlesnakes can sense infrared quite well with their tongues. Humans can sense infrared light with the nerves in our skin but we can't make out shapes or judge distances this way. A light bulb radiates most strongly at a wavelength of about 3000 nanometers.
Light is energy.
So the ozone layer is hot because of the energy it absorbs. Explain why the sky is blue during the day. The sky is blue because air scatters blue light more than it scatters red light. That air has scattered blue light so blue light is what enters your eyes. Explain why the sky is red when looking towards the rising or setting sun.