E20 fuel mix = 80 % gasoline + 20 % ethanol.
The policy aims to reduce reliance on oil and cut pollution.
Critics warn the lack of scientific evaluation could affect vehicle performance.
The debate highlights the balance between environmental goals and technical safety.
Ethanol is a renewable fuel made from crops such as sugarcane.
Delhi’s chief minister Arvind Kejriwal criticized the decision, saying it was made without proper scientific assessment.
Experts say thorough testing is needed to ensure engines work well and emissions are safe.
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