The Globe and Mail reports in its Monday edition that today the Ontario Court of Appeal will hear a constitutional challenge from the Ontario government to the federal Greenhouse Gas Pollution Pricing Act. Guest columnist Janis Sarra writes that valuable tax dollars are being expended in this litigation at a time when it is clear that, without effective carbon pricing, investors will move their capital elsewhere and Canadian businesses will suffer. Carbon pricing is viewed by almost every international financial and business organization in the world as an essential strategy to shift behaviour and achieve necessary reductions in carbon emissions. The insurance sector reports that in addition to harms to health and eco-systems from increasingly severe heat waves, forest fires and degradation of water supply, costs for businesses are growing in terms of investment and insurance. The Business Council of Canada has called carbon pricing the most efficient way to achieve Canada's climate-change goals. Ms. Sarra notes that major Canadian companies such as Teck Resources, Suncor Energy, BMO Financial Group, Desjardins Group and Barrick Gold support carbon pricing to stimulate clean technology and market innovation.