From Angela Cotton, Southampton, UK
I read “Megaprojects that could save the world” with a sense of despair. Intentionally or not, any such efforts will just distract from decarbonising using the technologies that we already have (16 March, p 36).
The last thing we need is a huge outlay in emissions to make space-based solar power, concrete islands for wind power and vast direct air capture plants. Faced with the great cost of removing carbon dioxide, perhaps demand reduction in hard-to-decarbonise sectors, like aviation and shipping, will become more palatable – especially if those sectors are asked to pay for CO2 extraction.
