黑洞社区

Space-age solutions to planetary problems

We were reminded of these imaginative suggestions for tackling climate change by the visual technology pioneered in our projects piece, combined with the rising airport capacity 鈥� and therefore CO₂ emissions 鈥� mentioned in the cost model.

1. Adding nutrients to the sea 鈥� CO₂ is fixed from surface waters by algae. Some of the carbon they take up sinks into the deep ocean as organic matter and faecal material, where it is consumed by bacteria and other organisms re-releasing the CO₂ into the deeper water. Geoengineering could speed up the process by increasing nutrient supply.
2. Mirrors in space 鈥� positioning sun shields in space to reduce the amount of solar energy reaching the earth. 
3. Capturing CO₂ from air 鈥� complicated but could be achieved by several methods, including: large-scale absorption of CO₂ on solids, similar to the systems being developed for power stations and absorption into highly alkaline solutions.

Unfortunately, all these ideas share an extremely large price tag, which could be why they鈥檝e been a little slow to come to fruition during the last five years.  

Read the full article from 9 March 2012, 鈥淕eoengineering: Space age solutions鈥�, here