India, May 30 -- The Delhi government is racing against time to carry out cloud seeding trials within its deadline of end-May to early June, as it has received permission from only one of the 10 concerned authorities it has approached for clearance, officials said on Thursday.

Delhi environment minister Manjinder Singh Sirsa said the government is aggressively pursuing the clearance and has sent a second reminder to the remaining authorities. He said the government plans to conduct the first trial in mid-June before monsoon onset in Delhi, which is usually June 27. To be sure, monsoon is advancing much faster this year.

"We wrote to all agencies following cabinet approval on May 8, but have so far received clearance only from the Specia...