I've seen some used ones on Ebay. You might try contacting the makers at their 'Contact Us' page on gatebox.ai. I don't understand Japanese so I can't navigate the Japanese version of their site, but supposedly that's where you can normally buy it. Source: almost 3 years ago

Klima Holdings W LLC They're fighting climate change by buying credits and reselling for a profit. They are not a WA energy company that ultimately is mandated to purchase carbon credits to continue operating in WA. Source: 12 months ago

I read that you wanted to create an App for a gym company. Have you thought about applying for a position at https://klima.com/ ? If I were in your shoes, I would definitely do so. They may be in Berlin but they'll probably be into hiring someone young and passionate for the cause like you are, or keeping you on record. Or, since you asked if KhanAcademy is available in the UK, at least recommend you a British... Source: over 1 year ago

I work for a small startup in Berlin (Klima) and I’ve had very similar conditions in my previous company of a similar size (20-30 people). It’s definitely not the norm here though, so I consider myself lucky to work in these progressive environments. Source: over 2 years ago

Visiting everything in incognito mode has the side effect of being asked each time what I want to do with my cookies. https://klima.com/ is the first website I ever visit that actually manages that properly. - Source: Hacker News / over 2 years ago

Actually I do personally offset my personal carbon footprint by taxing myself, via Klima: https://klima.com/ However that's not an efficient way for 8 billion people to get out of this problem. - Source: Hacker News / almost 3 years ago