A flare stack lights the sky from an oil refinery in Edmonton on December 28, 2018. The Ontario Teachers' Pension Plan Board is setting interim targets to curb greenhouse gas emissions tied to its multi-billion dollar portfolio. Canada's largest single-profession pension plan says it aims to slash the carbon intensity of its investments by 45 per cent by 2025 and by two-thirds by 2030, compared against its 2019 baseline. The targets come after the fund announced earlier this year a commitment to achieve net-zero greenhouse gas emissions by 2050. Big institutional investors have been under mounting pressure in recent years to invest in clean energy and sell off financial assets that contribute to climate change. THE CANADIAN PRESS/Jason Franson