OTTAWA—Prime Minister Justin Trudeau is promising Canada will slash its greenhouse gas emissions by 40 to 45 percent within the next decade. The cut applies to 2005 emission levels. The new target is higher than the 36 percent reduction the government says it can achieve under existing measures by 2030, and the 30 percent goal Canada initially agreed to under the Paris Agreement. Trudeau announced the higher target during a virtual climate summit of world leaders convened by United States President Joe Biden, who pledged to cut his country’s emissions by 50 to 52 percent by 2030. “If major economies in the room were to follow Canada’s lead and adopt a rising price on pollution and commit to phase out coal plants, we would accelerate our global path for a safe, prosperous net-zero future,” Trudeau said in an address.