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The Opportunity of Energy Efficiency
Today’s energy system is incredibly inefficient ― wasting $4.5 trillion, or almost 5% of global GDP ― all before any value is created with energy. Energy efficiency reduces waste, costs, and pollution — and it's essential to meet climate goals.
Improving the efficiency of our energy system will mean replacing fossil fuel technologies with rapidly scaling renewable energy and electrification solutions, which are often two to four times more efficient. Delivering fully on the promise of energy efficiency means creating more efficient products, buildings, and factories, and broader systems — like cities, industrial hubs, and supply chains. This whole systems approach to energy efficiency, coupled with a rapid transition to renewable energy, puts our most important climate goals within reach and can make the energy transition faster, more affordable, more equitable, and more widely beneficial.

We have a new energy crisis, and efficiency is the largest, cheapest, safest, cleanest, and fastest way to address it.
― Amory Lovins, Cofounder and Chairman Emeritus RMI, Author, Adjunct Professor
Understanding Energy Efficiency
The Importance of Accelerating Energy Efficiency
Expanding Our Vision of Energy Efficiency
The Energy Transition in 2025: What to Watch For
The Energy Efficiency Journey in Ghana
To Get Back on Course, World Must Deliver the Efficiency Goal
Improving Efficiency in the Built Environment
A Marketplace for Equitable Building Retrofits
Cost-Effective Grid-Interactive Efficient Buildings
The Retrofit Playbook for Large Buildings
Guide: Best Practices for Achieving Zero Over Time for Building Portfolios
Why State Land Use Reform Should Be a Priority Climate Lever for America
Building Urbanism into Climate Policy
Improving Efficiency in Industry
The Aviation Efficiency Revolution
Financing Energy Efficiency
The Battery Mineral Loop
Battery Circular Economy Initiative
Improving Efficiency in Transportation
The Aviation Efficiency Revolution
SHIFT Calculator
The DMV: An Unlikely Climate Champion
Improving the Efficiency of Electricity Systems
Power Shift
Three Myths About Renewable Energy and the Grid, Debunked
Community Solar+
GET a GRIP: A Path to More Renewable Energy on the Grid
How To Build Clean Energy Portfolios
How to Restructure Utility Incentives
Virtual Power Plant Flipbook
Rewarding What Matters in Energy Efficiency
RMI’s Energy Efficiency Legacy
How Big Is The Energy Efficiency Resource?
Reply to "The Efficiency Dilemma"
Jevons Paradox: The Debate That Just Won't Die
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