Bright light from around the world is reducing the of night. Years , when night-time fell, the dark arrived. Not . A new study says light at night grew in countries by 2.2 per cent a year between 2012 and 2016. This is causing us problems. The International Dark-Sky Association says it, "is not only [reducing] our of the universe, it is [badly] affecting our , our safety, energy consumption and ".
Artificial light is a to our environment. A scientist called it a " that threatens nocturnal animals and affects and microorganisms". It is affecting , mammals, and humans. It is reshaping " social ecological systems". Environmentalists thought LED would help. However, cities are using of these they are cheaper. This is adding to the light . Night-time light decreased in 16 countries.
