`` Synthetic tree '' would capture carbon dioxide in the air to reduce emissions . Comment: Technology is being developed by scientists at Columbia University in the U.S. Broecker : `` I think this is something that the world 's going to have to have ''
`` Synthetic tree '' would capture carbon dioxide in the air to reduce emissions . Trapped carbon would be compressed to liquid CO2 ready for sequestration . Technology is being developed by scientists at Columbia University in the U.S. Broecker : `` I think this is something that the world 's going to have to have ''