Hmm part 1 Cloud seeding

ill let you draw your own conclusion form this article in the brisbane times January 24, 2008
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A cloud-seeding trial has begun in Queensland's drought-stricken south-east following months of delays.Climate Change Minister Andrew McNamara today said two aircraft had started flying around the region, one collecting data and the other testing the technology."Successful cloud-seeding won't solve south-east Queensland's water crisis on its own, but would be part of an overall package of initiatives including recycling, more efficient water use, desalination and new storage facilities," Mr McNamara said.

The project is focusing on the Wivenhoe and Somerset dams.

Cloud-seeding is a technique that adds particles such as salt and silver iodide particles to clouds to enhance condensation and droplet and ice crystal formation.

The trial is part of the state government's $7.6 million four-year cloud-seeding research project, which is also investigating local weather systems and cloud microphysics.

Mr McNamara said even a modest increase in rainfall over catchments had the potential to assist inflows.

But he said the technique would only work with certain types of clouds and under the right conditions.

"Certainly the current La Nina (weather pattern) is likely to afford more opportunities to seed than the previous El Nino year," he said.