To reduce child mortality, we need to understand what children are dying from.<br><br><a href="https://ourworldindata.org/five-million-children-die-every-year-what-do-they-die-from"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/b8650845-1cae-4503-540d-d1c6681b4900/w=1024"/></a>

How much would fertility rates, life expectancy, or migration rates need to change to stop the population from shrinking?<br><br><a href="https://ourworldindata.org/south-koreas-population-is-set-to-shrink-what-would-it-take-to-stop-the-decline"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/133452ba-5209-482d-089c-c51f5b48b900/w=1024"/></a>

We created an interactive tool that lets you test how changes in fertility rates, life expectancy, and migration rates will change future populations.<br><br><a href="https://ourworldindata.org/population-simulation-tool"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/95c9945f-c253-4abe-cb79-a28adf7aea00/w=1024"/></a>

What can countries with high stunting rates today learn from Japan’s experience of going from 70% to 5%?<br><br><a href="https://ourworldindata.org/childhood-stunting-fell-dramatically-over-the-20th-century"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/c72d18f2-3c36-42d5-52da-02339ee93900/w=1024"/></a>

Surveys worldwide show that most people find common animal farming practices unacceptable, even where meat consumption is high.<br><br><a href="https://ourworldindata.org/most-people-care-about-farm-animals-our-food-system-doesnt-reflect-that"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/e8c1792e-598e-4cd7-7a1a-309ed38b3800/w=1024"/></a>

We’re hiring a writer who can make the world’s largest problems understandable to our large Our World in Data audience.<br><br><a href="https://ourworldindata.org/hiring-writer-2026"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/014e8530-1d3d-409d-136d-467639157700/w=1024"/></a>

Explore causes of death data for all countries, spanning more than four decades.<br><br><a href="https://ourworldindata.org/what-do-people-die-from-in-different-countries"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/b18a3db6-93e7-4e72-3afa-ffae811d6800/w=1024"/></a>

Batteries have become much cheaper, making energy storage far more affordable.<br><br><a href="https://ourworldindata.org/battery-price-decline"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/b0c1ea71-b663-4741-6574-67ffa449fe00/w=1024"/></a>

Romania’s history offers a rare natural experiment on what happens when abortion laws change rapidly. What can the rest of the world learn from this?<br><br><a href="https://ourworldindata.org/the-human-cost-of-unsafe-abortions"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/f022345d-6fae-4d0e-f408-54a324b62200/w=1024"/></a>

Improving waste management in low- and middle-income countries could cut global pollution by 98%.<br><br><a href="https://ourworldindata.org/why-cheap-waste-management-is-key-to-stopping-plastic-pollution"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/c405c34f-0816-4c07-c075-b259ab55ed00/w=1024"/></a>

Deaths from other animals are mostly caused by just two types: mosquitoes and snakes.<br><br><a href="https://ourworldindata.org/deadliest-animals"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/ff4b0c82-f048-4f76-f5d8-fba6a57d6000/w=1024"/></a>

Almost all countries have ended large-scale forced labor, often surprisingly recently.<br><br><a href="https://ourworldindata.org/slavery"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/fd9c3fb5-e863-48e5-d6df-a67fbf9e5000/w=1024"/></a>

Billions of people have access to far less electricity per day than is required to run an air conditioner for just one hour.<br><br><a href="https://ourworldindata.org/four-minutes-of-air-conditioning"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/d666d8d8-6937-495b-5e37-ae8d93cc0a00/w=1024"/></a>

What share of the world is religious, and how is this changing? Explore global data and research on trends in religiosity.<br><br><a href="https://ourworldindata.org/religion"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/d55e9c17-481a-4aab-81f7-3ee627dce800/w=1024"/></a>

To fuel all of the world’s aviation demand, global biofuels would need to more than triple and be exclusively used for air travel.<br><br><a href="https://ourworldindata.org/biofuels-demand-global-aviation"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/419676cb-a931-41ff-3fde-d93748a5e900/w=1024"/></a>

Both violent and property crime are far below their 1990s peak, but some crimes see periodic rises.<br><br><a href="https://ourworldindata.org/us-crime-rates"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/ad8c75ab-b3e2-4325-b53e-cf62e26f2600/w=1024"/></a>

How much bioenergy does the world produce, and what is it used for?<br><br><a href="https://ourworldindata.org/bioenergy-biofuels"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/99904e99-0b0b-4342-6177-51f2c29b6900/w=1024"/></a>

The world dedicates a Poland-sized area of land to liquid biofuels. Is there a more efficient way to generate energy?<br><br><a href="https://ourworldindata.org/biofuel-land-solar-electric-vehicles"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/9f05d67d-0d16-4494-86fd-23f5c563c200/w=1024"/></a>

Innovations in medicines and biotechnology have increased life expectancy and saved many lives. Explore how this happened, and how more progress can be made.<br><br><a href="https://ourworldindata.org/medicine-biotech"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/9616ed87-e2c7-4b41-ef80-7ac6d428c800/w=1024"/></a>

A look back at the most popular charts, articles, data insights, and more from Our World in Data in 2025.<br><br><a href="https://ourworldindata.org/top-of-the-charts-2025-redirect"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/ddab06f1-a4f4-4b0f-24e2-c376b650a600/w=1024"/></a>