PART A: What is the central idea of the text? Humans are largely unconcerned with the negative effects of light pollution as it benefits their daily cycle rather than disrupts it. Light pollution is one of the most difficult forms of pollution to remove from the Earth as nearly every person contributes to it. The artificial lights that humans flood the world with affects the functions of organisms that use visible light to guide various biological functions. While organisms are struggling to adapt to artificial lights now, eventually their daily cycles will change to accommodate the new schedule.