Green Century Capital Management filed a shareholder resolution with ExxonMobil to disclose information about its investments in Canadian oil sands, Triple Pundit reported on Thursday. By the end of last year, ExxonMobil’s total proved reserves in the oil sands were over 2.78bn barrels — just over 11% of the company’s total proved reserves, according to a press release by Green Century. Canada’s oil sands which is expected to become the primary source of crude to the US have attracted intense scrutiny in recent days as the US Congress heard submissions about the extension of the Keystone XL pipeline from Alberta to Texas.