Conservative political leaders lost their fight against the federal carbon tax at the Supreme Court. In a 6-3 ruling the court said the tax is constitutional. Alberta’s premier calls it a clear intrusion into provincial jurisdiction and is now considering his options. Kathleen Petty looks at what happens next with federal Environment and Climate Change Minister Jonathan Wilkinson, and then with University of Alberta economist Andrew Leach, Globe and Mail columnist Kelly Cryderman, and oil and gas writer and oilfield services executive David Yager.