Helpful hints about our website?

Would you like to tell us how we can improve our website? Have you noticed an error somewhere? Well, we look forward to hearing about it from you! Please direct any questions concerning environmental topics to our help desk (Bürgerservice) via "Ask UBA". Thank you very much!

We have copied the address of your last visited page. If your hint refers to another page, please copy the address here.
Is it a broken link or has a gremlin crept in? We would appreciate it if you could tell us so that we may quickly correct the error.
Let us know what you are looking for and where you have searched for it in vain. Perhaps we can add it to our website or make it easier to find.
What does four plus two equal?
Solve this maths problem and enter the solution with digits. E.g. for "What does two plus four equal?" enter "6".