Science + Art = Incredible Results. Check out these large grass portraits that use the concepts of photosynthesis to create an image. Grass is greener where it gets the most intense light. British artists Heather Ackroyd and Dan Harvey mounted sheets of grass seeds on clay in a dark room; the shades of green in the images are directly proportional to the amount of light received. The images can last for months, but slowly fade away according to the exposure of light the grass receives. Through this artwork, the artists hope to bring awareness to various environmental issues.

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