A Dutch news organization has published a trove of internal documents from the oil giant Shell showing the company knew about the link between fossil fuel and global warming as far back as the 1980s. Despite their own findings, Shell, like other oil companies, publicly disputed the climate science for decades. One confidential 1988 report from Shell was titled “The Greenhouse Effect.” It read, “Although CO2 is emitted to the atmosphere through several natural processes … the main cause of increasing CO2 concentrations is considered to be fossil fuel burning.” Friends of the Earth Netherlands is threatening to sue Shell unless it increases efforts to comply with the Paris climate accord.