An Indo-German effort has set sail to experiment and help determine the viability of sequestering carbon by promoting algae blooms with iron. In areas where iron is a limiting nutrient, geoengineers hope that adding iron sulfate to the ocean will promote (or "seed") algae blooms which in turn will capture carbon dioxide and sequester some of it when the plankton die and sink to the ocean's floor. Some environmentalists worry that the potential environmental impacts of iron seeding have not been appropriately assessed or considered.
Source: Ocean climate fix remains afloat [BBC News]
For more information on the LOHAFEX effort, see the Indian National Institute of Oceanography.
The CCBF also has more information on the basic science of climate change.
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