Seaweed could be scrubbing more carbon from the atmosphere than expected (2017) 8 years ago
Another problem is energy density as I said. How much solar energy can you harvest from one square kilometer? I am so surprised that people just handwave this basic fundamental limits away and don't realize that we would have to build solar panels on an enormous percentage of planet for it to be able to replace fossil fuels.
What are you talking about? From Elon Musk's TED talk, this is the area of solar panels required to power all of the US.
http://sustainsubstance.org/images/storage/2015-musk-bluesqu...