Data sources, notes and explanation

See below for details of the underlying datasets used in the map. You can download all the data – complete with notes on where and how specific datasets have been gap-filled using estimates – in the following two CSV files. Right-click the links, download the files and open them in your text or spreadsheet editor of choice.

Map data

Shading data

Area map

Description: Land area (sq. km)

Source: World Bank

Population map

Description: Population, total, 2013

Source: World Bank

Wealth map

Description: Total GDP (PPP, current international $)

Source: World Bank

Notes: Most data for 2013, but with some infilling of blanks from earlier years.

Extraction map

Description: Potential CO₂ emissions from annual extracted fossil fuels, 2013

Source: BP Statistical Review of World Energy 2014, converted to CO₂ by Duncan Clark, using the following BP conversion factors: oil, 3.07 tonnes CO₂ per tonne; gas, 2.35 tonnes CO₂ per tonne of oil equivalent; coal, 3.96 tonnes per tonne of oil equivalent.

Emissions map

Description: Total emissions of CO₂ from fossil fuel burning and cement production, 2013

Source: Glen Peters et al., Global Carbon Project

Consumption map

Description: Carbon footprint of all goods and services consumed, 2012

Source: Glen Peters et al., Global Carbon Project

Historical map

Description: Cumulative CO₂ emissions from energy use, 1850–2011

Source: WRI, Climate Analysis Indicators Tool.

Reserves map

Description: Potential CO₂ emissions from "proven" fossil fuel reserves, end of 2013

Source: BP Statistical Review of World Energy 2014, converted to CO₂ by Duncan Clark, using the following BP conversion factors: oil, 3.07 tonnes CO₂ per tonne; gas, 2.35 tonnes CO₂ per tonne of oil equivalent; coal, 3.96 tonnes per tonne of oil equivalent.

People at risk map

Description: People exposed to droughts, floods and extreme temperatures

Source: World Bank

Notes: Original dataset was % of population exposed in the period 1990–2009. This has been multiplied by the 2013 population to give an estimate of the people currently exposed.

Sea level map

Description: Population living less than 5m above sea level

Source: World Bank

Notes: Original dataset was % of population. This has been multiplied by the 2013 population to give an estimate of the total population currently living below 5m.

Poverty map

Description: Population living below $1.25 a day

Source: World Bank

Notes: Calculated by multiplying the 2013 population total by the % of population living on less than $1.25 in the most recent year for which data is available.

Emissions change shading

Description: Change in CO₂ emissions, 1990–2008

Source: Glen Peters et al., Global Carbon Project

Emissions per person shading

Description: CO₂ emissions per capita, 2013

Sources: see Carbon Emissions and Population above.

GDP per person shading

Description: GDP per capita, 2013

Source: World Bank

Notes: Data from 2013 with some gap-filling from earlier years.

Population growth shading

Description: Rate of annual population growth, 2013

Source: World Bank