Age standardization is a statistical method used to compare disease rates, or other health indicators, between populations while accounting for differences in their age structure.

Suicide rates can be reduced with greater understanding and support for people at risk.

The available resources have increased substantially. We should expect that the field continues to advance rapidly.

Exponential growth is at the heart of the rapid increase of computing capabilities.

Global population has increased rapidly over the past century. This period of rapid growth is temporary: the world is entering a new equilibrium and rapid population growth is coming to an end.

Over the last 50 years, holes in the ozone layer have opened up. Why does that matter for life on Earth?

We published a redesign of our work on the ozone layer. Explore all of our writing and charts in one place.

Johns Hopkins University will stop publishing data on confirmed COVID-19 cases and deaths. Our team will replace our entire time series with WHO's data on 8 March 2023.

On Our World in Data, we present thousands of metrics on hundreds of topics. How do we choose them?

Explore data visualizations on waste management.

We published a major redesign of our work on the Environmental Impacts of Food. Explore all of our data and research in one place.

It is easy to underestimate the magnitude of this change. Understanding this can help us see how different the world could be in the future.

We need to focus on the most threatened species to protect them from extinction. But what does it mean for a species to be at risk, and how is it measured?

On this page, you can find data, visualizations, and writing about changes in efficiency, price, and access to lighting.

Many believe there is a real chance that human-level AI will be developed within the next decades, and some believe that it will exist much sooner.

We published a major redesign of our work on Democracy. Explore all our data and research in one place.

On this page, you can find data, visualizations, and writing on global and country-level food prices and expenditures, the affordability of food, and how this has changed over time.

How does spending on food change as incomes rise?

Explore global data and visualizations on military personnel and spending on this page.

Tourism has massively increased in recent decades. Explore data and visualizations on the history and current state of tourism across the world on this page.

Changes in the world population are determined by two metrics: the number of babies born and the number of people dying.