One in ten people in the world is over 65 — how does this compare in the youngest and oldest countries?

China makes and exports more goods than any other country. So, perhaps unsurprisingly, when I think about China’s economy, the first thing that comes to mind is manufacturing — increasingly at the technological frontier in electric vehicles, batteries, and solar panels.

China’s position in manufacturing follows decades of economic transformation. The chart shows one aspect of this: the decline in agricultural employment.

At the turn of the 21st century, around half of all Chinese workers were employed in agriculture. One generation later, that share had more than halved, reaching 22% in 2025.

I find it striking how far the share of workers in agriculture has fallen, and just as striking how high it remains. Agriculture employs more than a fifth of China’s workers, while accounting for less than 7% of its GDP.

If the world is to reduce its carbon emissions and tackle climate change, it needs to move away from fossil fuels to low-carbon power.

There are two key sources of low-carbon electricity: renewables — which include solar, wind, hydropower, and others — and nuclear power.

While rapid growth in solar and wind has increased the amount of electricity coming from renewables, a lack of enthusiasm for nuclear means it’s playing a shrinking role in the global mix.

In the chart, you can see the share of global electricity coming from fossil fuels, renewables, and nuclear since 1985. Since 2000, nuclear and renewables have followed very different trajectories. Back then, both accounted for a similar share of global electricity. But in 2025, renewables made up more than three times as much: 34% compared to 9%.

The total amount of electricity produced by nuclear plants is about the same as it was two decades ago. But because the world produces much more electricity overall, its share of the electricity mix has declined.

The World Bank’s International Poverty Line is an extremely low poverty line. Set at $3 per day, it draws attention to the living conditions of the poorest people on the planet.

In the chart above, you can see how the share below this poverty line has declined over the last generation. In the year 2000, 36% of the world’s population lived on less than $3 per day. In 2024, it was 10%.

But is progress against global poverty only happening when measured against such a very low poverty line?

The chart gives the answer. The entire blue line is below the entire dark red line. This tells us that no matter what line you choose, the share below it has declined globally.

Progress against higher poverty lines has been large, too. The share living on less than $5 a day has declined from 57% to 25%, and the share living on less than $10 a day has declined from 74% to 53%.

But on the right-hand side of the chart, we see that most people still live on low incomes: 81% of people in the world live on less than $30 a day, or about $900 a month.

The HIV epidemic — which started in the early 1980s and progressed rapidly in the 1990s — has had lasting impacts that continue today. More than 800,000 people still die from HIV/AIDS every year.

But some countries were hit much harder than others.

In the chart, you can see the share of all deaths in a given year caused by HIV/AIDS in four countries that were particularly badly affected.

At the height of the epidemic, more than half of all deaths in Zimbabwe and Botswana, and over 40% in South Africa and Namibia, were caused by the disease.

Thankfully, interventions to prevent the spread of HIV and treatments such as antiretroviral therapy have reduced death rates across the world. But about one in five deaths in these countries was still caused by AIDS in 2023.

Religious compositions vary a lot from country to country.

In my own country, the United Kingdom, Christianity is the most popular, and following no religion is becoming increasingly common, particularly among young people. But I struggle to get a sense of how these differences stack up globally.

The Pew Research Center publishes estimates of religious affiliation across the world. You can see the global breakdown in the chart for 2020 (the most recent year available). It shows the number of people who identify with each religion. Pew counts people by the religion they report, regardless of their beliefs or practices.

You can see that Christians are the largest group, with 2.3 billion people, followed by Muslims, with 2 billion. People with no religious affiliation come close behind.

Those not affiliated with any religion are among the largest groups in the world. But this undersells religion’s reach: when we add up all religious groups, most people in the world — around three in four — identify with a religion. Those with no religious affiliation are still a minority.