To search U.S. treaties, start by entering the U.S. Treaties & Agreements Library and select the U.S. Treaty Index subcollection.
![screenshot of U.S. Treaties & Agreements Library highlighting U.S. Treaty Index subcollection](https://help.heinonline.org/wp-content/uploads/2022/04/2022-04-11_16-12-27-min-1024x339.png)
Use the search tool provided. As an example, let’s look up treaties regarding climate change.
![screenshot of U.S. Treaty Index search tool](https://help.heinonline.org/wp-content/uploads/2022/04/2022-04-11_16-15-07-min-1024x479.png)
The results will look something like this:
![screenshot of search results](https://help.heinonline.org/wp-content/uploads/2022/04/2022-04-11_16-16-13-min.png)