Photosynthetically active radiation, often abbreviated PAR, designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic organisms are able to use in the process of photosynthesis.
I am chemically man-made like the Incredible Hulk
englishrick speaking on Cheese
Originally Posted by englishrick
Smoking it is a fucking liability
Originally Posted by Chunkypigs
They accept every states med cards, print one off the internet and come over, lol!