Waste heat from houses or hot water pipes can be converted into electricity. Fermenting food waste is already used to produce hydrogen.
Now, an American research team has accelerated the process by adding yeast.
Their patented method can produce hydrogen as a clean fuel source within 18-24 hours instead of the usual several days, while also eliminating the risk of explosion.
Used with solar thermal technology, moreover, it could be harnessed to produce hydrogen locally in places without electricity.
A development that would find a use for the $200 billion worth of food discarded by Americans each year.
An even better strategy: planning shopping trips on a full stomach and extending the shelf life of products using natural means.
