"On the morning of Friday, June 4, an underground gas pipeline running through the ancient state of Tatarstan sprang a leak. And not a small one.

In a different era, the massive leak might have gone unnoticed.

But hovering 520 miles above the Earth, a European Space Agency satellite was keeping watch. The four-year-old Copernicus Sentinel-5P, which orbits the planet 14 times a day, looks for traces of methane and other gases."

Steven Mufson, Isabelle Khurshudyan, Chris Mooney, Brady Dennis, John Muyskens, and Naema Ahmed report for the Washington Post October 19, 2021. [2]