Required. 150 characters or fewer. The username should consist only of letters A-Z, a-z and numbers. While the special characters "-_." are allowed in the middle of a user name, two special characters in a row are not.
A confirmation email will be sent to this address.
Your password must contain at least 8 characters.
Enter the same password as before, for verification.
When was the first Passivhaus built in Darmstadt-Kranichstein? Hint: The answer is 1991.