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What are cookies?

A cookie is a small text file that a website stores on your computer or mobile device when you visit the site.

First-party cookies: These are cookies set by the website you are visiting. Information collected by these cookies can only be read by the website that sets the cookies.

Third party cookies: These are cookies set by external services that are present on the website you are visiting.

How are cookies used?

Clean Sky uses cookies to ensure the smooth technical functioning of our website and for anonymised user statistics. When you visit the Clean Sky website, you will be prompted to accept or refuse our cookies. You can change your preferences or delete the cookies stored in your browser at any time.

What cookies do we use?

Necessary cookies:

These cookies are necessary to ensure smooth functioning of the Clean Sky website.


Clean Sky makes use of Matomo analytics to assess how visitors make use of the website. Matomo is compliant with European data protection regulations and the IP address of users is masked.

The information gathered from Matomo analytics is used to improve the functioning of the website for users. All data collected is anonymised. Only Clean Sky and its Webmaster have access to this data.

Third party cookies:


Clean Sky has YouTube videos embedded in its website. In order to watch videos on the Clean Sky website, it is necessary to accept all cookies for YouTube. Clean Sky has no control over the cookie and privacy policy of Youtube and how they process personal data. If you do not wish to accept YouTube cookies on our website but still wish to view the video, you can choose to click on the link and be redirected to the YouTube website. Please note, if you leave the Clean Sky website, we will still be subject to the cookie and privacy policy of YouTube.


Mailjet is a third party service used by Clean Sky to send out its newsletter. You can choose to opt in or out of its cookies. CleanSky has no control over the cookie and privacy policy of Mailjet.

Other social media outlets:

Clean Sky has various social media accounts, which are linked to the website. Cookies from these social media accounts are not present on the Clean Sky website. However, if you choose to click on their links, you will be redirected to their websites and subject to their cookie and privacy policies.

How to control cookies

You can control whether or not to accept cookies on most browsers. For the most frequently used browsers, you can find instructions for configuring cookie settings below:

Detailed step by step guidance on how to control and delete cookies is also available from

Contact information:

If you have any questions relating to this on-line service, please contact the support team operating under the responsibility of the Controller, using the following e-mail:

For any questions related to your rights, please contact the Data Protection Officer at  by indicating ‘Data Protection’ in the subject and explicitly specifying your request.