University of Waikato law student Sarah Thomson is rapidly gaining support for her High Court lawsuit against the New Zealand Government.

A donations page has been set up for a student who is suing the government over its lack of action on climate change.

A Givealittle page has been set up to assist Hamilton law student Sarah Thomson, who's taking a case against the government to Wellington's High Court, claiming it failed to set appropriate targets for emissions reductions.

READ MORE: Hamilton student sues government over climate change targets

The page has been set up by former Hamilton city councillor Daphne Bell, who said she wanted to help Thomson with costs associated with the case.

Bell joins high-profile supporters Dr James Hansen, climate scientist and former Nasa heavyweight, and Victoria University Professor James Renwick. Both men signed affidavits supporting Thomson's case.

Although an Auckland law firm is helping Thomson pro bono, there's already been a $540 charge to have the case filed in the High Court, Bell said.

"As the case will be heard in Wellington, there will also be travel and accommodation costs."

Thomson is an impressive young woman, Bell said, "who is carrying the torch for the next generation by her bold action."

The case asks the court to judicially review the target set for reducing New Zealand's climate changing emissions.

Thomson said she was inspired to take legal action when a group of environmentalists in the Netherlands successfully sued the Dutch government for failing to properly act against climate change.