22 September 2017 – Québec, Ontario and California reached an agreement integrating and harmonizing emissions cap programs. By signing this agreement, Ontario will now formally enter the Québec-California carbon market, effective 1 January 2018. This will allow all three governments to hold joint auctions of GHG emission allowances and to harmonize regulations and reporting. This demonstrates their shared commitment to achieving the objectives of the Paris Agreement as well as the value of governments working together across borders. Read the full article on the Government of Ontario website.