Around one-fifth of development aid is spent on climate-related projects. But what does climate-related mean, and does it crowd out other aid projects?<br><br><a href="https://ourworldindata.org/how-much-development-aid-is-spent-on-climate-change"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/59464533-c5ca-4a7e-7686-358fc7608500/w=1024"/></a>

Learn how inequality is measured, who produces key databases, and what the data tells us.<br><br><a href="https://ourworldindata.org/we-published-a-new-topic-page-on-economic-inequality"><img src="https://ourworldindata.org/cdn-cgi/imagedelivery/qLq-8BTgXU8yG0N6HnOy8g/8572fbf8-1c9c-4176-a865-12735e86a000/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>