(Axios) – The Environmental Protection Agency (EPA) unveiled a proposal on Thursday that would require most U.S. cities to replace lead water pipelines within 10 years. Why it matters: The EPA estimates that 9.2 million lead pipelines bring water to people across the U.S. The pipes can corrode over time when water has high acidity or low mineral content. Exposure to the extremely toxic heavy metal can have dangerous health effects. (Read More)