Top scientists responsible for the “Doomsday Clock” issued a stark warning about how close the world is to catastrophe due to the climate emergency, nuclear weapons, and “disruptive technologies in other domains.” Launched by the Bulletin of the Atomic Scientists in 1947 as a symbol for “how close we are to destroying our world,” the clock remains at 100 seconds to midnight for the third year straight.

While heatwaves, fires, and floods produce warnings that “we are living in a climate emergency, here and now,” a scientific study suggested Thursday that a crucial Atlantic Ocean current system could collapse, which “would have severe impacts on the global climate system.” The study, published in the journal Nature Climate Change, focuses on the Atlantic Meridional Overturning Circulation, which includes the Gulf Stream.

More than 500 organizations pressured political leaders in the United States and Canada to reject carbon capture as “a false solution” that has become “a dangerous distraction driven by the same big polluters who created the climate emergency.” The messages were not only shared as letters, but also published as full-page advertisements in the Washington Post and Ottawa’s Hill Times.

In an open letter to Canadian Prime Minister Justin Trudeau and Deputy Prime Minister Chrystia Freeland, 42 Nobel laureates implored the federal government to “act with the moral clarity required” to tackle the global climate crisis and stop Teck Resources’ proposed Frontier tar sands mine.