Mongabay: Geoengineering schemes that aim to slow global warming by seeding oceans with iron to boost carbon dioxide-absorbing phytoplankton may not lead to long-term sequestration of the important greenhouse gas, finds a new study published in the journal Geophysical Research Letters. The research looked at the impact of the 2010 eruption of Eyjafjallajökull volcano, which released large amounts of iron in the North Atlantic near Iceland. Some researchers speculated that iron fertilization would lead to...