Abstract
COP27 was concluded in Egypt in November 2022 and the world leaders renewed their pledge for the net zero since the world is running out of fossil energy and materials at an alarming rate which was not predicted a few years ago. It is a result of excessive use and waste of energy and materials. The concepts of circular economy and sustainable development were endorsed by all nations of the world and collective efforts and policies were launched. The focus of this article will be how the waste can be converted into wealth be that GHG carbon dioxide, (waste) biomass not used as food, and waste plastic of all kinds by using green hydrogen. Hydrogen will be the savior of the world.
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