discovery.com: Proposals to mask global warming by mimicking the cooling effects of volcanic eruptions have hit a little snag: Far more dust could be needed than expected.

New modeling of the effects of sunlight-reflecting sulfate particles of different sizes injected into the stratosphere to reduce the sunlight reaching Earth’s surface suggest that at least 50 percent more faux volcanic dust would be required. That makes the task a tad more taunting.

What’s more, the authors of the new study caution that the side effects of such a massive ‘geoengineering’ project are still unknown. [ read more ]