Noting that diesel is prime source of air pollution in Delhi, the Tribunal said the situation is so alarming that people have been even advised to leave Delhi due to adverse effects on health.
"A number of countries like Brazil, China, Denmark etc are in the process or have prohibited diesel vehicles or are in the process of doing away with them and imposing stringent taxes on the vehicles.
The Tribunal directed the Transport department of Delhi government and other concerned authorities to prepare a comprehensive data of registration of all such vehicles which are 10 or more years old.
It slammed the authorities for not complying to its orders of November 26, 28 and December 4 last year to better the air quality standards of the capital.
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"Due to the increasing pollutants of air, the life of residents of NCR Delhi is becoming more vulnerable to various diseases and the greatest sufferers are young children," it said.
"It has been pointed out that diesel is the prime source of bringing air pollution in Delhi. Diesel fumes cause damage to the lungs, brain and can cause even cancer. The situation is so alarming that medically people have been even advised to leave Delhi," the Tribunal said.