RNZI reports Labour is also calling for the government to take a humanitarian approach to people from the region who are overstayers in New Zealand.
United Nations warns if sea level rise continues at the current rate, the Pacific atolls of Kiribati and Tuvalu could be completely submerged within decades.
Terry Edwards has lived on Kiribati's main atoll of Tarawa his entire life.
The people there feared for the future, he said.
"We are so afraid and we think about Kiribati, Kiribati maybe in future is going to sink, we worry about it."