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Live mosquitoes will be exterminated using ultraviolet light.

The World Health Organization’s International Agency for Research on Cancer says alcohol is a Group 1 carcinogen, putting it in the company of tobacco, asbestos and ultraviolet radiation.

Using a deep ultraviolet laser, the team demonstrated how precisely delivered pulses of light can trigger localised chemical reactions on a diamond surface.

In particular, they let in light within the blue and red ranges -- the optimal wavelengths for photosynthesis -- but appear to block ultraviolet radiation from penetrating into their shells where it might otherwise damage their DNA.

The Earth-size ovals, which are visible only at ultraviolet wavelengths, are embedded in layers of stratospheric haze that cap the planet's poles.