Qatar has the highest per capita carbon dioxide emissions worldwide, at **** metric tons per person. Many countries in the Middle East had high levels emissions, especially when compared to countries in Africa. Greenhouse gas emissions worldwide Some of the Middle East’s largest oil producing countries, including Qatar, the United Arab Emirates, and Saudi Arabia are among the world’s largest carbon dioxide (CO₂) emitters per capita. Countries such as the United States, Australia and Canada also show disproportionately high levels of emission per inhabitant. Despite a relatively low population for its size, Canada’s CO₂ emissions have recently surpassed *** million metric tons, and the country is now amongst the largest producers of CO₂ emissions worldwide. Rising emissions Global greenhouse gas emissions have been on the rise since the industrial revolution began approximately 200 years ago. Over the past half-century CO₂ emissions have skyrocketed, and climbed to a record high in recent years. Yet, emissions fell considerably in 2020 as a result of the COVID-19 pandemic, which caused disruptions to transportation and industrial activities.

Australia had the highest per capita greenhouse gas emissions of all OECD member countries in 2023, at ** metric tons of carbon dioxide equivalent (tCO₂e). Canadians were the second-worst carbon polluters that year, with average emissions of just over ** tCO₂e/cap.13 of the ** OECD member countries had per capita emissions below the global average in 2023, with Costa Rica, the most recent OECD member, averaging just below **** tCO₂e/cap.

This data product is a time series of Carbon Dioxide (CO2) emissions from fossil fuel combustion and cement manufacture. Estimates of CO2 emissions are included for the globe and by nation back to 1751, and include emissions from solid fuel consumption, liquid fuel consumption, gas fuel consumption, cement production, and gas flaring. Per capita CO2 emissions and emissions from international trade (bunker fuels) are included as well; bunker fuels are not included in country totals, but are assigned to the country in which loading took place. Estimates are generated using the United Nations Energy Statistics database and the United States Geologic Survey’s cement statistics. Datasets produced from this group at Appalachian State University are located here, and are also located at https://energy.appstate.edu/research/work-areas/cdiac-appstate. Historic CDIAC data from Oak Ridge National Laboratory are located here: https://data.ess-dive.lbl.gov/view/doi:10.3334/CDIAC/00001_V2017. This dataset is the foundational dataset for the annual global carbon budget and other carbon cycle analyses that need relevant fossil fuel CO2 data. Within this data package are spreadsheets (.csv) of global and national estimates of CO2 emissions as well as text files of the ranking of each country’s total CO2 emissions and per capita for that year.

In 2023, Switzerland led the ranking of countries with the highest average wealth per adult, with approximately ******* U.S. dollars per person. Luxembourg was ranked second with an average wealth of around ******* U.S. dollars per adult, followed by Hong Kong SAR. However, the figures do not show the actual distribution of wealth. The Gini index shows wealth disparities in countries worldwide. Does wealth guarantee a longer life? As the old adage goes, “money can’t buy you happiness”, yet wealth and income are continuously correlated to the quality of life of individuals in different countries around the world. While greater levels of wealth may not guarantee a higher quality of life, it certainly increases an individual’s chances of having a longer one. Although they do not show the whole picture, life expectancy at birth is higher in the wealthier world regions. Does money bring happiness? A number of the world’s happiest nations also feature in the list of those countries for which average income was highest. Finland, however, which was the happiest country worldwide in 2022, is missing from the list of the top twenty countries with the highest wealth per adult. As such, the explanation for this may be the fact that the larger proportion of the population has access to a high income relative to global levels. Measures of quality of life Criticism of the use of income or wealth as a proxy for quality of life led to the creation of the United Nations’ Human Development Index. Although income is included within the index, it also has other factors taken into account, such as health and education. As such, the countries with the highest human development index can be correlated to those with the highest income levels. That said, none of the above measures seek to assess the physical and mental environmental impact of a high quality of life sourced through high incomes. The happy planet index demonstrates that the inclusion of experienced well-being and ecological footprint in place of income and other proxies for quality of life results in many of the world’s materially poorer nations being included in the happiest.

In 2023, China was the biggest carbon polluter in the world by far, having released 11.9 billion metric tons of carbon dioxide (GtCO₂). Although the U.S. was the second-biggest emitter, with 4.9 GtCO₂ in 2023, its CO₂ emissions have declined by 13 percent since 2010. By comparison, China’s CO₂ emissions have increased by more than 38 percent in the same period. Cumulative emissions Although China is currently the world's largest carbon polluter, the U.S. has released far more historical carbon dioxide emissions, at more than 400 GtCO₂ since 1750. The wide gap between the two countries is because China's emissions have mostly been produced in the past two decades. Combined, the U.S. and China account for roughly 40 percent of cumulative CO₂ emissions since the Industrial Revolution began. Sources of emissions One of the largest sources of global CO₂ emissions is the power sector, with electricity produced by coal-fired power plants a significant contributor. In China, emissions from coal-fired electricity generation have soared since the turn of the century, and reached 5.2 GtCO₂ in 2023.

The United States is the biggest producer of transportation emissions worldwide, having emitted the equivalent of **** billion metric tons of carbon dioxide (GtCO₂e) in 2023. This was more than the combined transportation emissions produced in China, India, and Russia. The U.S. also has the highest transport emissions per capita globally.