Advocates for Climate Innovation (ACI) seeks to contribute to solving the climate change problem by identifying transformative solutions that lack the needed Federal policy support, and then securing that policy.  We seek bipartisan approaches that create incentives to stimulate innovation.

We are currently focused on two important, yet under-resourced, areas: (1) carbon dioxide removal from the atmosphere, an urgently needed complement to emission reduction, and (2) next-generation geothermal power production, a highly-promising complement to other clean-power production techniques.  We have been working on carbon dioxide removal policy since 2017 and on geothermal policy since 2023.

We provide both funding and substantial staff time and execution management for our projects. We generally take the initiative in designing the objective of each of our projects and in recruiting both the organizations and the additional funders needed to achieve that objective. Among other approaches, we support research, policy analysis and policymaker education, and we lead coalitions of partner organizations to work with policymakers on new policies. We work on and fund a very small number of projects at a time but are highly committed to driving measurable outcomes for each of them.

We were founded in 2006 by Larry Linden and Roger Ullman as Linden Trust for Conservation, and rebranded in 2025 as Advocates for Climate Innovation. Until 2014, our focus was primarily on conservation finance and environmental markets. Since 2015, we have focused on U.S. climate policy.

We seek to help U.S. policymakers develop comprehensive climate policy frameworks and strategies for implementing them. We are currently focused on two important yet under-resourced components of such frameworks: (1) carbon dioxide removal from the atmosphere, an urgently needed complement to emission reduction, and (2) next-generation geothermal power production, a highly promising complement to other clean-power production techniques. We have been working on a carbon dioxide removal policy since 2017 and a geothermal policy since 2023.

See Climate Policy Initiatives for more information.

The Linden Trust for Conservation (LTC), founded in 2006 by Larry Linden, formerly a Partner at McKinsey and Goldman Sachs, and Roger Ullman, formerly a Managing Director at Merrill Lynch, is led by a team with deep experience in finance and management. Since its founding, that experience has informed LTC’s commitment to seeking bipartisan and economically sound approaches to addressing critical environmental challenges. At heart, we share the common values of wise stewardship of our natural resources and the efficacy of markets, incentives, and innovation. We seek to identify practical, efficient, and non-partisan solutions that allow people to find common ground and move forward. Until 2014, our focus was primarily on environmental markets and biodiversity conservation. Since 2015, we have been almost entirely focused on U.S. climate policy.

Advocates for Climate Innovation (ACI) seeks to contribute to solving the climate change problem by identifying critical unmet needs that lack the needed Federal policy support, and then securing that policy.  We seek bipartisan solutions that create incentives to stimulate innovation.

We are currently focused on two important, yet under-resourced, areas: (1) carbon dioxide removal from the atmosphere, an urgently needed complement to emission reduction, and (2) next-generation geothermal power production, a highly-promising complement to other clean-power production techniques.  We have been working on carbon dioxide removal policy since 2017 and on geothermal policy since 2023.