Study sheds light on how alcohol use impacts Alzheimer's disease

A new Scripps Research study links heavy alcohol use to the most common form of dementia. In other news, South Bay residents who notice a rotten egg smell have a new tool to understand its health risk. We learn more on the latest response to the cross-border sewage crisis. Plus, artificial light has disrupted the sleep and circadian rhythms of people, and it’s also affecting living things that share our urban space.