61
Who has contributed most to global CO2 emissions?
Our impact on climate change is not just about emissions that occur today. How much we emitted in the past also matters.
Our World in Data
Research and data to make progress against the world’s largest problems.
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Visit ourworldindata.org → RSS feedOn Hacker News Jun 2016 – Oct 2026
Society, Policy & Culture 107Science & Space 104Tech Industry & Business 2History & Retro Computing 1
62
A number of countries have decoupled economic growth from energy use, even if we take offshored production into account
Energy use is declining in some countries, despite economic growth.
63
Half of the world’s habitable land is used for agriculture
More than three-quarters of global agricultural land is used for livestock, despite meat and dairy making up a much smaller share of the world's protein and calories.
64
What was the death toll from Chernobyl and Fukushima?
When we think of nuclear safety, two accidents often come to mind: Chernobyl and Fukushima. What was the death toll and impact of these disasters?
65
Economic Inequality
How is inequality measured, who produces key databases, and what does the data tell us?
66
United States - CO₂ and Greenhouse Gas Emissions Country Profile
Data on the United States’ greenhouse gas emissions
67
Energy Mix
Explore global data on where our energy comes from, and how this is changing.
68
If the world adopted a plant-based diet, we would reduce global agricultural land use from 4 to 1 billion hectares
We could reduce the amount of land used for grazing and croplands used to grow animal feed.
69
Data review: ethnographic and archaeological evidence on violent deaths
What quantitative data is there about violent deaths in non-state societies?
70
Breakdown of carbon dioxide, methane, and nitrous oxide emissions by sector
How much do electricity, transport, and land use contribute to different greenhouse gas emissions?
71
COVID-19 Pandemic
The COVID-19 pandemic has had a profound impact on the world. Explore global data and research to understand its impact, spread, and global response.
72
Human Height
The average height of a population can inform us about the nutrition and living conditions of populations in the past for which we have little other data.
73
Fertility Rate
Explore changing patterns in fertility worldwide, from birth rates to parental ages, twinning rates, reproductive technologies, and more.
74
Sector by sector: where do global greenhouse gas emissions come from?
Globally, we emit around 50 billion tonnes of greenhouse gases yearly. Where do these emissions come from? We take a look, sector-by-sector.
75
Poverty
In order to make progress against poverty in the future, we need to understand poverty around the world today and how it has changed.
76
Population Growth
Explore global and national data on population growth, demography, and how they are changing.
77
How much of the world’s land would we need in order to feed the global population with the average diet of a given country?
There are large differences in the land of different diets, mostly depending on how much meat people eat.
78
What share of global CO₂ emissions come from aviation?
Aviation accounts for 2.5% of global CO₂ emissions. But it has contributed around 4% to global warming to date.
79
Almost all of the world’s mammal biomass is humans and livestock
Humans and livestock make up 95% of the world’s mammal biomass; wild mammals are just 5%.
80
Land Use
How is humanity using the Earth’s land? And how can we decrease our land use so that more land is left for wildlife?
81
Which form of transport has the smallest carbon footprint?
How can individuals reduce their emissions from transport?
82
Coronavirus (COVID-19) Testing
Explore data on COVID-19 testing across the world.
83
How do CO2 emissions compare when we adjust for trade?
Which countries are net importers and exports of emissions? How much CO2 is ‘offshored’?
84
Hunger and Undernourishment
What are the consequences of undernourishment and how can we make progress against hunger and undernourishment?
85
Environmental Impacts of Food Production
What are the environmental impacts of food production? How do we reduce the impacts of agriculture on the environment?
86
The short history of global living conditions and why it matters that we know it
Very few think the world is making progress. In this article, we look at the history of global living conditions and show that the world has made immense progress in important aspects.
87
You want to reduce the carbon footprint of your food? Focus on what you eat, not whether your food is local
“Eat local” is a common recommendation to reduce your diet's carbon footprint. How does the impact of what you eat compare to where it comes from?
88
Fossil Fuels
Fossil fuels were key to industrialization and rising prosperity, but their impact on health and the climate means that we should transition away from them.
89
What are the safest and cleanest sources of energy?
Fossil fuels are the dirtiest and most dangerous energy sources, while nuclear and modern renewable energy sources are vastly safer and cleaner.
90
Mortality Risk of COVID-19
Explore data on the mortality risk of COVID-19 across the world.