Alberta’s tar sands are among the most carbon-intensive sources of oil. The Canadian province announced it would temporarily curtail oil production in 2019 in the face of a saturated market and depressed prices. Credit: Mark Ralston/AFP/Getty Images When hundreds of activists protesting the Keystone XL pipeline were arrested at the White House in 2011, their ultimate target lay thousands of miles away: Canada’s tar sands. If they stopped the pipeline, they argued, that could slow the growth of this particularly dirty source of oil and score a limited but significant win for the climate. This week, with the market saturated and prices depressed, Alberta’s premier announced that her government would temporarily curtail the province’s oil production , chiefly from the tar sands, because there isn’t enough pipeline capacity to ship the crude to market. It was a startling announcement from a government whose prevailing energy policy has been to […]