The Green Party says scientists are starting to have an influence on international security policy as well as the military.
Climate change spokesperson Kennedy Graham told a United Nations Association conference in Wellington there is a realisation that climate change could cause global instability.
He said the Security Council has made a statement recognising climate change as a 'risk multiplier' and a potential threat to international peace and security.
Mr Graham said policy makers are becoming aware of the security implications of global warming, such as the movement of people due to lack of food or water.
He said the major armed forces of America, China and Germany are now conducting research on the implications of climate change.