Professor Hannah Daly:

That is correct. Temperature neutrality, even at the global scale, is a necessary condition for meeting the temperature goals, but it is not sufficient. Under temperature goals, we must limit global warming to a 1.5°C increase. If we simply stabilise temperatures, we could stabilise temperatures at an increase of 2.5°C or 3°C. The council has not tested the extent to which its temperature neutrality scenarios are compatible with an increase of 1.5°C and well below 2°C. This is the main problem.