In climate news, New York prosecutors said Monday that former ExxonMobil CEO Rex Tillerson used a separate email address and an alias when discussing climate change. The disclosure came in court documents filed by New York Attorney General Eric Schneiderman as part of a criminal probe into charges Exxon knew that fossil fuels cause global warming as early as the 1970s, but hid that information from the public. Tillerson, who retired from Exxon shortly before becoming President Trump’s secretary of state, used the alias “Wayne Tracker” on a separate email account when discussing global warming between 2008 and 2015. Exxon now faces questions about whether it complied with a subpoena requiring it turn over all records relevant to Schneiderman’s investigation.