More Blocks, Less Diesel

When it comes to recycling, glass isn't a priority in Hong Kong.

Or at least it wasn't until a smart cookie at the Hong Kong Polytechnic University found a way to transform recycled glass and construction waste into what he calls "Eco-Block", a brick that catalyses nitrous oxides in the air around it by converting them into non-hazardous substances. The blocks are able to reduce nitrous oxides in the air around them by 20 percent.

It's not a terrible idea, but the only life forms in Hong Kong that would directly benefit from such blocks would be dogs and cats and birds. And since the blocks cost up to 30 percent more than regular bricks, you know the government won't be using them to build sidewalks.

But then it wouldn't have to use them if it would do something meaningful about the atrocious levels of nitrous oxides being pumped into the air each day.

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