Inside Climate News: Hidden beneath Boston lies a vast network of aging iron and steel pipes that leak natural gas from thousands of points under the city. A small number of these leaks emit large volumes of methane, a potent greenhouse gas, while others pose an immediate explosion hazard, according to a recent peer-reviewed study published in the journal Environmental Pollution. The study looked at 100 randomly selected leaks from leak-prone cast iron pipes, the oldest of which had been in service since 1893. Fifteen...