Proposed global warming solution needs more scientific research
A new method to combat global warming by dumping iron into the sea needs to be treated with caution, governments and scientists warn.
Neither the safety nor the effectiveness of ocean fertilization - adding iron or other "micronutrients" to the sea to encourage plankton to grow - have been established and the method should not be touted as a cure for climate change until they have been, cautions the World Conservation Union (IUCN).