Delhi Environment Minister Gopal Rai requested the Central government to grant the necessary permission for artificial rain in the capital to curb air pollution during the winter months.
Singh, who is also the AAP MP in Rajya Sabha, has demanded a high-level investigation into the matter.
With the increase in wind speed and if the light rain takes place as predicted, the air quality will improve in the coming days, the minister said while speaking to a news agency over Delhi's air pollution situation.
The Union Ministry of Defence had sent a proposal to remove and transplant 114 trees to clear its construction site.
On June 25, the Delhi High Court barred NBCC, a central government construction company, from cutting trees till July 4.
