HI SB2965

Requires the Hawaii Climate Change Mitigation and Adaptation Commission to prioritize, identify, utilize, and maintain nature-based solutions in climate change mitigation and adaptation efforts at regional, state, and local levels.

Defines "nature-based solutions" as actions that work cooperatively with built and modified ecosystems to protect, sustainably manage, and restore natural or modified ecosystems while providing human well-being and biodiversity benefits.

Mandates the commission develop a science-based carbon budget for Hawaii based on the UN Intergovernmental Panel on Climate Change Fifth Assessment Report, with the goal of limiting global warming to below two degrees Celsius above pre-industrial temperatures.

Authorizes the commission to develop individual carbon budgets for Hawaii's major energy use sectors, including electricity generation, ground transportation, and marine, aviation, and industrial energy.

Takes effect on January 28, 2045.