The Tilia Fund is a partnership of private donors interested in solving the world's environmental problems. The primary mission is to reduce the threat of global climate change, advance energy efficiency and renewable energy, reduce reliance on coal, and protect the world’s forests.

The Tilia Fund partners with other funders to support effective organizations and initiatives in each space. The energy work aims to bring energy efficiency and renewable energy sources to scale and reduce reliance on fossil fuels. Often, it costs very little to use cleaner alternatives, and with the right policies and novel financing mechanisms tens of billions of dollars of investment can be unlocked to grow efficiency and renewable energy resources. The Tilia Fund also supports global energy efficiency standards that protect consumers from paying the hidden cost of sloppy engineering or construction practices. The support for land, forest, and species conservation emphasizes innovative financing models that leverage private capital, and rigorous monitoring and verification of protected lands.

Programs
The Tilia Fund currently funds projects totaling over $10M annually, in four major program areas. Major grantees in each area include: 

Promoting energy efficient buildings and appliances

1. Energy Foundation
2. Institute for Market Transformation
3. American Council for an Energy-Efficient Economy
4. Appliance Standards Awareness Project
5. Building Codes Assistance Project

Bringing renewable energy to scale

1. Vote Solar Initiative
2. Interstate Renewable Energy Council
3. Environment America Research & Policy Center
4. CalCEF Innovations 

Reducing reliance on coal

1. Energy Foundation
2. Sierra Club Foundation
3. Earthjustice 

Protecting forests and species

1. World Resources Institute
2. World Wildlife Fund
3. Rainforest Action Network
4. WildAid
5. Environmental Investigation Agency