Is rain produced by clouds seeded in neighbouring countries harmful?
Cloud-seeded rain does not cause significant impact on the environment and human health.
22 Sep 2015
In the tropics, cloud seeding is normally targeted at convective or cumulus clouds which have a typical life span of just one to two hours. As winds are generally light in our equatorial region, the possibility of seeded clouds in neighbouring countries being blown to Singapore within such a short time is remote.
A common cloud seeding agent used by neighbouring countries is sodium chloride (common salt). The low salt content in cloud-seeded rain does not cause significant impact on the environment and human health. Rain water analysis conducted by the National Environment Agency (NEA) has not shown any unusual change in the rain composition.