Light Pollution - National Geographic Society People all over the world are living under the nighttime glow of artificial light, and it is causing big problems for humans, wildlife, and the environment There is a global movement to reduce light pollution, and everyone can help
Light Pollution 101 - Education Learn about the major types of light pollution, their impact on human health, and how the worldwide glow from artificial light may continue to grow Ever since the light bulb's invention 150 years ago, artificial light has illuminated homes, streets, and skies — but with some unintended consequences
Abiotic Factors - Education | National Geographic Society An abiotic factor is a non-living part of an ecosystem that shapes its environment In a terrestrial ecosystem, examples might include temperature, light, and water In a marine ecosystem, abiotic factors would include salinity and ocean currents
Light Pollution - Education People all over the world are living under the nighttime glow of artificial light, and it is causing big problems for humans, wildlife, and the environment There is a global movement to reduce light pollution, and everyone can help
Pollution - Education | National Geographic Society Light Pollution Light pollution is the excess amount of light in the night sky Light pollution, also called photopollution, is almost always found in urban areas Light pollution can disrupt ecosystems by confusing the distinction between night and day
Noise Pollution - Education Environmental groups are urging the U S Navy to stop or reduce using sonar for military training Seismic surveys also produce loud blasts of sound within the ocean Ships looking for deep-sea oil or gas deposits tow devices called air guns and shoot pulses of sound down to the ocean floor
Bioluminescence - Education | National Geographic Society Bioluminescent Light The appearance of bioluminescent light varies greatly, depending on the habitat and organism in which it is found Most marine bioluminescence, for instance, is expressed in the blue-green part of the visible light spectrum These colors are more easily visible in the deep ocean
Explorer Home - National Geographic Society Cameron has also developed unprecedented deep ocean exploration vehicles, lighting and 3D camera equipment He has led eight deep ocean expeditions from 1995 to 2012, including three to the Titanic wreck
MapMaker: Light Pollution - Education Light pollution, or artificial light at night, is the excessive or poor use of artificial outdoor light, and it disrupts the natural patterns of wildlife, contributes to the increase in carbon dioxide (CO2) in the atmosphere, disrupts human sleep, and obscures the stars in the night sky
Marine Ecosystems - Education At the surface of the ocean, the euphotic zone, the ecosystem receives plenty of light and oxygen, is fairly warm, and supports many photosynthetic organisms Many of the organisms that we associate with marine ecosystems , such as whales, dolphins, octopi, and sharks, live in the open ocean