The Greens are calling for a new visa category for climate change refugees from the Pacific.

They have released a policy on the Pacific, saying Australia needs to do more to live up to its responsibilities in the region.

Greens human rights spokeswoman Sarah Hanson-Young says Australia should do more to help Pacific islanders affected by climate change.

"The Greens are suggesting that we do need a new visa category and that we need to start planning for that in our migration intake," she said.

"Because if we don't start talking about it now, in 20, 30 years, people are going to wonder why we ignored it and now we're having to be faced with it."

Senator Hanson-Young also says maternal and child health should get more funding, while aid overall should increase to 0.7 per cent of national income, which is higher than the amount the Labor and Liberal parties are pledging.