NEW DELHI : The National Green Tribunal Wednesday refused to entertain a plea seeking modification of its order banning vehicles over 15 years old from plying on Delhi roads on the ground that it will save lives of senior citizens during corona pandemic.A bench headed by NGT Chairperson Justice Adarsh Kumar Goel dismissed the plea filed by Delhi resident and senior citizen Kamal Sahai and said it had junked similar petitions in the past and even the Supreme Court has upheld its order.The plea said that in view of the present pandemic that the country is facing, the NGT directions be modified in order to permit the use of old vehicles on public roads till the spread of virus is under control."This measure, in the submission of the applicant,.