Infrared too. Infrared from the sun penetrate the skull and prevent inflammation in the brain. The effect is reduced dementia in people tha go outside. The inf

Infrared too. Infrared from the sun penetrate the skull and prevent inflammation in the brain. The effect is reduced dementia in people tha go outside. The infrared is reflected by the plants and thus walking in the shade of tree give increase of infrared exposure. It affect every cell of our body (mitochondria in fact) (Our biology has not evolved inside)