Achieving Energy Sustainability

When it comes to their energy systems, all countries face the same fundamental challenge: how to balance the trade-offs required to ensure Energy Security, Energy Equity, and Environmental Sustainability.

These are the three core dimensions that define energy sustainability, according to the World Energy Council. It is the trade-offs required to achieve all three dimensions that forms the Energy Trilemma. The 2018 World Energy Trilemma Index measures 125 countries on their ability to balance these dimensions.

Download Executive Summary >

2018 World Energy Trilemma Index

View Rankings

Monitoring the sustainability of national energy systems

A delicate balance.

Robust energy systems are secure, equitable and environmentally sustainable, showing a carefully managed balance between these three dimensions of the Energy Trilemma. But maintaining this balance in the context of today’s rapid transition to decentralized, decarbonized, and digitized systems is challenging: there are risks of passive trade-offs between equally critical priorities.


World Energy Trilemma 2018: Summary Report

The annual ranking of the Trilemma Index measures the performance of national energy systems in 125 countries across the three dimensions. The results show impacts of decisions and changes, suggesting where policy coherence and integrated policy innovation can help develop robust energy systems in the context of the Grand Energy Transition.

Download Report

2018 World Energy Trilemma top 10 performers

This year’s Trilemma Index shows that many countries are managing the balance successfully, with eight nations achieving a top AAA balance score. Denmark, Switzerland and Sweden top the overall rankings, with well-balanced energy systems. Denmark also achieves the highest score for Energy Security, followed by Slovenia and Canada, all demonstrating secure, diverse and resilient systems. The Energy Equity dimension ranking is topped by smaller countries, where connectivity is managed well, as well as countries where energy is affordable due to government policies: Qatar tops the list, followed by Luxemburg, Bahrain and the Netherlands. The Environmental Sustainability ranking identifies countries with low carbon and energy intensity, resulting in lower emissions. This includes the Philippines, Costa Rica and Uruguay.