Which country is most responsible for climate change? It’s a big question, with weighty consequences for decisions on who should take the lead in tackling the rise in emissions.

Finding a way to recognisedifferent responsibilitiesbetween developed and developing countries was one of the keys to unlocking the historicParis Agreement, sealed late last Saturday.

To shed a bit more light on historical responsibility for emissions,Aurélien Saussay, an economist at theFrench Economic Observatory, has put together the interactive map above.

It combines year-by-year CO₂emissions from fossil fuels and cement with gridded population data (laid out on a map). You can read Saussay’s methodology by following the tab in the interactive.

Here’s a timelapse video by Saussay showing where emissions have come from historically, and how cumulative emissions have built up over time.

The emissions data comes from theCarbon Dioxide Information Analysis Center (CDIAC). It excludes other greenhouse gases and emissions associated with land-use change and forestry.

It’s also worth noting that the data coverage varies by country. It goes back all the way to 1751 for the UK, with Germany from 1792, the US from 1800, India from 1858 and China only from 1899.

Thegridded population datais from the Netherlands Environmental Assessment Agency (PBL).

主要的图像放大e: Interactive: Global Historical Emissions Map preview. Credit: Saussay (2015)/CartoDB.