Some scientists describe the Government's target for cutting greenhouse gas emissions as short-sighted.
The Climate Change Institute at Victoria University says the aim of reducing emissions by 10% to 20% of 1990 levels by 2020 does not do enough to achieve long term goals.
Institute director Martin Manning says the Government may agree with international goals of limiting global warming to two degrees, but the 2020 target is too slow moving.
He says more should be done to encourage the use of technologies including electric cars and cleaner energy.
But Professor Manning acknowledges it's difficult to reduce emissions from agriculture, which make up about half of New Zealand's greenhouse gas emissions.