Noel Cunniffe is chief executive of Wind Energy Ireland, the business group representing the wind power sector in Ireland.

For his policy changes, Cunniffe chose to ensure the planning system is equipped for the volume of renewables projects coming down the line, to launch a communications campaign around upgrading the electricity grid, and to create an energy demand strategy to use Ireland's excess renewables' resources.

For his personal changes, Cunniffe explained how he was gardening for biodiversity, and how he was building his new home with clean energy in mind.

Tomás Sercovich is chief executive of Business in the Community Ireland, a business association providing advice and leadership on sustainability and corporate social responsibility.

For his policy changes, Sercovich chose to ensure more diverse boards, to refocus valuation in companies on non-financial outcomes, and to future-fit business models for opportunities in sustainability.

For his personal changes, he spoke about choosing to work in corporate sustainability, and how he is making more sustainable choices in his life.

Margie McCarthy is Director of Research and Policy Insights at the Sustainable Energy Authority of Ireland (SEAI). Through her work, McCarthy is at the forefront of Ireland's sustainable energy revolution and has a passion not only for solving its technical challenges, but for overcoming the social obstacles to the scale of change needed.

For her policy changes, McCarthy chose to create a vision for Ireland in 2050, to accelerate the roll out of district heating, and to wind down fossil fuel subsidies.

For her personal changes, McCarthy chose to buy no new dresses in 2024, and to tune in to opposing opinions.