NEW DELHI:- An Indian court on Wednesday challenged the Delhi city government to prove that its restrictions on cars were improving air quality in the world’s most polluted capital. The Delhi high court said a trial ban, that allows most private cars to use the roads only on alternate days, was causing inconvenience to the public due to inadequate public transport. With pollution levels still running at 10 times the international safe limits, it ordered the government to submit data for January 1-7 by Friday so the impact of the ban could be assessed.–AFP