Cookie notice
1. Introduction
This Notice explains how Global Change Data Lab (“GCDL”, “we”, “our”, “us”) uses cookies and other tracking technologies through our website (https://ourworldindata.org). This should be read alongside our Privacy policy, which explains how we use personal data. You can choose not to accept certain cookies. If you have accepted but then decide to reject our use of cookies, please disable them following the guidance below.
2. What are cookies?
Cookies are small files that are placed on your computer or mobile device by a website when you visit it. They contain details of your browsing history on that website and distinguish you from other users. Cookies send data back to the originating website on each subsequent visit. Cookies are useful because they allow a website to recognise a user’s device and, for instance, remember your preferences and generally improve your online user experience.
You can find out more about cookies at www.allaboutcookies.org.
3. Why do we use cookies?
We use cookies to:
- let you navigate and do things on our website. In other words, some cookies are necessary for our website to function.
- collect statistics – the information collected by cookies enables us to improve the website through usage figures and patterns. For example, to see which pages of the website are the most popular and how users are interacting with them.
- analyse how individuals interact with us so we can improve our services.
- ensure that our website is secure – for example, to make sure that personal information that you give to us does not fall into the wrong hands if you make a donation.
Name | Source | Domain | Optionality | Type | Duration | Description |
|---|---|---|---|---|---|---|
cookie_preferences | Our World in Data | ourworldindata.org | Mandatory | First party | 3 years | Recording cookie consent. |
_ga | Google Analytics | .ourworldindata.org | Optional | Third party | 2 years | User analytics. |
_ga_{container-id} | Google Analytics | .ourworldindata.org | Optional | Third party | 2 years | User analytics. |
__stripe_mid | Stripe | .ourworldindata.org | Mandatory | Third party | 1 year | Fraud prevention on the donate page. |
__stripe_sid | Stripe | .ourworldindata.org | Mandatory | Third party | 30 minutes | Fraud prevention on the donate page. |
m | Stripe | m.stripe.com | Mandatory | Third party | 2 years | Fraud prevention on the donate page. |
cookie-perms | Stripe | .stripe.com | Mandatory | Third party | 6 months | Fraud prevention on the donate page. Stores a user's cookie permissions. |
__Secure-sid | Stripe | .stripe.com | Mandatory | Third party | 30 minutes | Fraud prevention on the donate page. Tracks activity in a browsing session across Stripe websites. |
_GRECAPTCHA | Google reCAPTCHA | www.google.com | Mandatory | Third party | 6 months | Captcha on the donate page. |
__Secure-1PSIDCC | Google reCAPTCHA | .google.com | Mandatory | Third party | 1 year | Captcha on the donate page. |
__Secure-1PSIDTS | Google reCAPTCHA | .google.com | Mandatory | Third party | 1 year | Captcha on the donate page. |
__Secure-3PSIDCC | Google reCAPTCHA | .google.com | Mandatory | Third party | 1 year | Captcha on the donate page. |
__Secure-3PSIDTS | Google reCAPTCHA | .google.com | Mandatory | Third party | 1 year | Captcha on the donate page. |
__Secure-STRP | Google reCAPTCHA | .google.com | Mandatory | Third party | 5 minutes | Captcha on the donate page. |
DV | Google reCAPTCHA | .google.com | Mandatory | Third party | 35 minutes | Captcha on the donate page. |
NID | Google reCAPTCHA | .google.com | Mandatory | Third party | 6 months | Captcha on the donate page. |
SIDCC | Google reCAPTCHA | .google.com | Mandatory | Third party | 1 year | Captcha on the donate page. |
UULE | Google reCAPTCHA | .google.com | Mandatory | Third party | 6 hours | Captcha on the donate page. |
We also follow a standard procedure of using log files. These files log information about visitors when they visit websites. The information collected by log files includes internet protocol (IP) addresses, browser type, time stamp and the referring page. The purpose of the information is for analysing trends and security.
5. Accepting cookies
By clicking the "Accept optional cookies” button when you visit the website you consent to our use of cookies as updated from time to time. In particular, you consent to cookies being stored on your computer or mobile device (unless rejected or disabled by your browser).
6. How can you change your cookies settings?
You can manage cookies yourself by (un)checking the checkboxes and submitting the form at the top of this page. You may need to refresh your settings for your preferences to be registered. However, you should be aware that some of our cookies are necessary for the functioning of our website. You cannot opt out of our use of those cookies.
You can also set your web browser to refuse cookies, delete cookies, or to alert you when cookies are being sent. You will need to visit the web browser’s site to manage cookies — please consult the help of your browser to understand how to set these preferences.
7. Updates to this notice
We may update this notice, so we recommend that you check it regularly. We aim to notify users of any significant changes via a notice on our website.
Last updated: January 16, 2026.