Sixteen-year-old climate activist Greta Thunberg is rejecting the criticism she's receiving from "grown-ups" who she says should instead spend their time "acting on the science" that shows the environment is in serious danger. Thunberg, a Swedish native, addressed the flak while visiting Canada on Friday as part of her multination tour to draw attention to the climate crisis. “That we should take as compliment that we are having so much impact that people want to silence us,” Thunberg said at a Montreal rally, as reported by The Associated Press. “We’ve become too loud for people to handle, so people want...