A positive outcome from the Zero Carbon Bill is it has brought scientists and primary industry groups together to try and work out solutions to reducing emissions said Mackle.
"We're having conversations and learning from each other ... so that's a good thing."
The Government's suggestion of reducing methane from 24 to 47 per cent by 2050 is something that DairyNZ does not support said Mackle, although at this stage it is provisional so there was "no need to panic."
"At the same time, we're making it very clear that we don't support that based on the fact that the science doesn't support that ... in fact that's really based on some global scenarios that are not grounded in our context."
Careful planning and collaboration will be needed to reach the target deadlines, even though they are decades away, said Mackle.
"At the end of the day, people say 'oh it's 30 years away,' - but I can remember 1989 pretty clearly actually. It'll come round reasonably quickly."
"We've got to be responsible in the way that we plan this ... we solve this big problem for the globe and at the same time make sure we can feed people with high quality premium food."