A recent change now also allows one to use a plain-old email address and password. (But, my recommendation would be to adopt OpenID instead.)

I created an account a while ago and now try to log in again but it doesn't work. (I created a new account by accident) what did I do wrong?

If you just want to ask or answer a question you do not need to register. You do need to register if you want to earn reputation which lets you vote, retag, and edit.

To register for Climatedeal.org, click the login link at the top of the page. Rather than storing users and passwords ourselves, Climatedeal.org integrates with OpenID accounts.

Basically this is a new "login once, go to any site" technology. If you already have one (it will look like a web address starting with http:// your-username.your-provider.com /), then enter it into the text box on the login page (including the http://) and click the Login button. If you don't have one (or think you don't have one), keep reading...

Any website can become an OpenID provider. Many, like Google, Facebook, and Yahoo! already are. If you don't have any of those, you can get a new OpenID by following this procedure:

Go to https://www.myopenid.com/signup Make up a user name Put in a password Enter any email address you want to use Enter the text in the captcha Check the I Agree to... checkbox Click Sign Up That should give you an OpenID and it will look like a website address (http://...myopenid.com). You can use that on any OpenID site including Climatedeal.org.