02:50 PM GMT, November 5th, 2013
09:59 AM GMT, October 30th, 2013
02:54 PM GMT, October 22nd, 2013
CNN's Ian Lee goes to Egypt to meet Faris Farrag, a former banker who now farms plants and breeds fish with an "aquaponic" system. Aquaponic systems rely on recirculation, meaning there is little waste and better efficiencies. On Farrag’s farm, gases exhaled by his fishes are pumped into the greenhouse, while oxygen produced by the plants is circulated back to the fish farm.
02:32 PM GMT, October 15th, 2013
12:31 PM GMT, October 8th, 2013
09:51 AM GMT, October 2nd, 2013
03:40 PM GMT, September 24th, 2013
01:13 PM GMT, September 23rd, 2013
06:04 PM GMT, September 20th, 2013
02:06 PM GMT, September 13th, 2013
Mallika Kapur reports on the world's first 100% biodegradable plastic which completely disappears into the environment.
The process involves adding an enzyme when the plastic bag is produced. After the bag is discarded and comes into contact with soil, the combination of the two act as a catalyst to break down the molecules in polythene.
Within 6 months the bag completely disappears into the environment leaving no toxic residue behind.
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