First, let me remind everyone that our pollution-pricing policy is designed to grow a clean economy, which is something that we really care about. What we have done at the beginning is to make sure that what is costing farmers the most is exempted. Emissions from livestock and crop production are not priced. Farm fuels and fuels from cardlock facilities are exempt, and there's a partial rebate for propane and natural gas used in commercial greenhouses.
Also, the department has prepared estimates reflecting the federal backstop, using a price of $50 per tonne. This shows an average increase of 0.2% to producers' net operating costs and a decrease of 1% to producers' net operating incomes due to carbon pollution pricing.
These are the levels, I would say, of data we have. I will just remind you that the Department of the Environment will proceed, has committed to proceed, in 2020 to a revision of—