Young people are good at coming up with novel solutions... like a robot that picks up trash.
The co-founders of Hive Earth are experimenting with an eco-friendly building design that draws on centuries of history.
They reported 33 grams of iron, 13 grams of silicon and 7 grams of chromium in a standard mobile phone.
Take a piece of trash and turn it into something valuable. It's a simple yet great idea.
We might soon start seeing the piles of waste generated by the fast food industry getting a bit smaller.
The average user in the United States consumes 141 rolls of toilet paper each year.