A solution for the pollution caused by cars?

Yesterday I was talking about what might be done to reduce emissions from older cars and today I stumbled across an article in Engadget about a carbon sequestering technique developed in Wales. The product is currently in prototype form, and you can read about it here

I think the Greenbox looks like a very interesting product. However, the part which really caught my attention was the comments section. I was quite amazed by the number of people who wanted to criticise the device, even without knowing anything about it.

Someone told me years ago that criticism is easy, it's creation which is the hard part, I think that is very true!