I think it depends on the context. Are we limiting carbon emissions to zero? Are we looking to reach Paris targets?
Certainly it's the sooner, the better, because if we can work with government to implement all our initiatives and at least show our due diligence and that we are actively pursuing going as green as possible, then we won't get to 2030, when it's $170 per tonne. The sooner it's done, the more money we'll save, in terms of what we're going to pay. We would, however, need support from the government through grant money and subsidies of upfront costs to make this feasible.