Yes, absolutely. I have a precise figure for the cost of inaction.
It's $21 billion to $43 billion per year by 2050, according to 2011 estimates from the National Round Table on the Environment and the Economy.
It is substantial.
In the study that Environment Canada published a few days ago, they mentioned an effect of 0.1% on the GDP. In the budget forecasts in April, the effect was 0.45%.
Canada’s Ecofiscal Commission estimates that the impact could be practically nil if the redistribution of income in Canada is considered.