Professor John FitzGerald:

Because by failing to meet our 2020 target as a result of our inadequate policies over the past decade, we have an even bigger ask. As I mentioned in my opening statement, even if we meet our 2030 target, the ask after then will become even more difficult. The concern is that we are pushing the issue further down the line. I will be dead before the crisis hits but the Deputy might have more of a problem.