In many countries the amount of time parents spend with their kids has been increasing over the last 50 years.

In adolescence we spend the most time with our parents, siblings, and friends; as we enter adulthood we spend more time with our co-workers, partners, and children; and in our later years we spend an increasing amount of time alone.

The world faces two energy problems: most of our energy production still produces greenhouse gas emissions, and hundreds of millions lack access to energy entirely.

How people spend their time is similar in many ways across countries: we all sleep, work, eat, and enjoy leisure. But there are also important differences in the freedom people have to spend time on the things they value most.

Fossil fuels dominate the global power supply because until very recently electricity from fossil fuels was the cheapest. This has changed dramatically. In most places power from new renewables is now cheaper than new fossil fuels.

To continue providing daily updates on the Coronavirus Pandemic, Our World in Data has switched from ECDC to Johns Hopkins University as our data source for confirmed cases and deaths.

For much of human history, our ancestors were trapped in an economy in which incomes were determined by the size of the population. The Industrial Revolution ended this Malthusian economy and made it possible for a country to leave abject poverty behind.

There are two ways that COVID-19 deaths can be presented over time: by the date of death, or the date on which the death is reported. The data for Sweden is shown by date of death – this means the most recent points should be treated as incomplete.

Globally, aviation accounts for around 2.5% of CO₂ emissions. But for many, it accounts for a much larger share.

40% of eligible voters in the US did not vote in the 2016 election. Young Americans in particular often do not exercise their right to vote – less than half of eligible under-30s voted in the last election.

Americans have a lower life expectancy than people in other rich countries despite paying much more for healthcare. We explore the number of factors which might explain this difference.

Aviation accounts for 2.5% of global CO₂ emissions. How much from short vs. long-haul flights? How much from rich vs. poor countries?

Flying is a highly controversial topic in climate debates. It accounts for around 2.5% of global CO₂ emissions, but 3.5% when we take non-CO₂ impacts on climate into account.

For individuals, transport can be the largest part of their carbon footprint. If you need to travel, what is the lowest-carbon way to do so?

The Our World in Data dataset which has tracked COVID-19 testing across the world since the start of the pandemic has been peer-reviewed and published in the academic journal, Nature.

Transport accounts for around one-fifth of global CO₂ emissions. But where do these emissions come from, and how might they change in the coming decades?

Millions of people use Our World in Data every month. We looked at survey responses to understand who uses our work, and what for.

We teamed up with the YouTube channel, Kurzgesagt to make a video about climate change: its drivers and possible solutions.

It’s often argued that life expectancy across the world has only increased because child mortality has fallen. But this untrue. The data shows that life expectancy has increased at all ages.

Globally, we emit around 50 billion tonnes of greenhouse gases each year. Where do these emissions come from? We take a look, sector-by-sector.

To help us improve Our World in Data, we have launched an audience survey to understand your needs.