IEA ‘Energy and Climate Change’ (WEO Special Report 2015) — a plain summary

What this document is

‘Energy and Climate Change’ is a special report in the International Energy Agency’s World Energy Outlook series, published in 2015 as a dedicated briefing for the 21st Conference of the Parties (COP21) in Paris. Rather than the usual broad outlook, it focused specifically on the intersection of the energy system and climate policy.

Its central purpose was to translate the climate pledges that countries were submitting ahead of Paris, then called Intended Nationally Determined Contributions (INDCs), into what they meant in practical energy terms. This page summarises the report’s intent and significance from general knowledge; consult the IEA original for its specific projections.

What it covers

Because energy is responsible for the great majority of greenhouse gas emissions, the report treated the energy sector as the decisive arena for climate action. Its themes broadly included the following.

• An assessment of what the submitted national pledges implied for global energy-related emissions;
• The gap between those pledges and the trajectory needed to keep warming in check;
• Practical measures, centred on energy efficiency and cleaner power, that could strengthen the outcome;
• The idea that emissions could be curbed without holding back economic growth;
• The importance of regularly reviewing and raising ambition over time.

The report is often remembered for arguing that a peak in energy-related emissions was achievable with measures already available, framed as a bridge towards the longer-term goals under discussion at Paris.

Why it matters

Coming from the world’s most influential energy body, the report carried particular authority in the pre-Paris debate. It reframed climate change as, above all, an energy question, and offered a concrete sense of how far national pledges went and where more effort was needed.

It remains a useful historical marker of expectations on the eve of the Paris Agreement. As many articles that once linked to the original PDF now reach a dead link, a stable summary preserves that reference.

How it relates to UK energy

The report’s emphasis on efficiency and cleaner power maps directly onto the choices facing UK consumers, from cutting waste at home to buying greener electricity. The pledges it analysed evolved into the framework under which Britain now sets its own carbon commitments.

For the household angle, see our guide to renewable energy and our wider environment guides.

You can find the original via the International Energy Agency (IEA).

Frequently asked questions