Based on events during the dust storm in Sydney in 2009, scientists determined that, by dumping large amounts of sand and dirt into the ocean, global warming could possibly be slowed. The dirt that was thrown into the ocean by the dust storm helped fuel an increase in phytoplankton and fish, as well as creating excess algae. The idea is that this excess algae would absorb more carbon dioxide, then be consumed by fish, which would die and sink to the bottom of the ocean, preventing that carbon from being released into the atmosphere for thousands of years. The effectiveness of this theoretical method unsure, with experts having widely varying opinions.
Other ideas include solar radiation management and cloud whitening over the ocean near Australia. These may limit the intensity of weather patterns in the area and possibly serve to alleviate drought and prevent flooding. Again, these techniques are not certain to work and all geoengineering must be “approached with great caution.”
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