Living in cities, we are constantly surrounded by concrete, traffic, noise and pollution. This is not the way we’re meant to live. Humans have had an evolutionary bond with plants since the beginning of . The human eye can distinguish between 2,000 shades of green, but only 100 shades of red. Recognizing a plant’s shade of green was important when you were about to eat it or use it for shelter or medicine. This could be why we’re drawn to plants.