How much light is too much light? The Darkness Manifesto urges us to cherish natural darkness for the sake of the environment, our own wellbeing, and all life on earth. The world's flora and fauna have evolved to operate in the natural cycle of day and night. But constant illumination has made light pollution a major issue. From space, our planet glows brightly, 24/7. By extending our day, we have forced out the inhabitants of the night and disrupted the circadian rhythms necessary to sustain al...