Throughout his tenure as premier Wall was known as a staunch defender of Saskatchewan resource-based industries, especially potash and oil and gas. In 2010, Wall rose to national prominence through his opposition to an attempted hostile-takeover of Saskatoon-based PotashCorp, which was the world's largest potash producer, by Australian mining giant BHP Billiton. The $38.6 billion deal would have been the largest takeover in Canadian history, but the premier argued that Saskatchewan stood to lose billions in resource revenues and that such a takeover would damage Canada's strategic interests; the federal government ultimately blocked the deal, and Wall was subsequently named the Business News Network "newsmaker of the year," and the CTV "politician of the year." Wall persistently championed the province's fossil fuel industries as well. In 2011 the Saskatchewan Party led investment of $1.2 billion to build the world's first industrial-scale carbon capture and storage unit at SaskPower's Boundary Dam power station in order to extend the use of coal in the province. In 2014 Wall was vocal in lobbying the federal government to strengthen its regulation of the oil industry, arguing that stronger measures would aid pipeline development. Wall would later be a vocal critic of efforts to lower greenhouse gas emissions, considering federal efforts like the Pan-Canadian Framework on Clean Growth and Climate Change and even global efforts like the Paris Climate Accord to be threats to the province's energy industry. Wall was particularly vehement in his opposition to a federal carbon tax, an issue Wall helped to put at the center of conservative political agendas across the country and at the national level. Wall also took aim at civil society calls for climate action, for example lambasting the Leap Manifesto and calling it an "existential threat" to the oil industry. Such stances drew the ire of environmentalists, and the province was persistently criticized for its environmental measures and its lack of regulation of industries in particular. The 2016 spill of more than 200,000 liters of oil into the North Saskatchewan River from a Husky pipeline was blamed in part on a lack of proper regulation and monitoring. The province's 2017 climate change plan, meanwhile, was largely panned by environmental organizations.