Geoengineering is happening now, just not necessarily purposefully. Anthropogenic GHG induced climate change is unwitting geoengineering, as is large scale water diversion projects like the Aral sea. Urbanization by paving over more reflective land with more absorbant asphalts and rooftops is also geoengineering.
I think in the long run intentional large scale thorough geoengineering Geoengineering of Mars and possibly Venus is unavoidable if humanity is to survive. And pretty large scale geoengineering of earth will also likely be highly desirable and extend far beyond merely countering or counterbalancing some modest undesired climate trends of either natural or anthropogenic origin. The Amongst the possible geoengineering solutions for earth are:
1. Seeding the ocean with large but practical quantities of iron oxide to spur plankton growth and CO2 absorption
2. Cloud seeding to increase reflectivity
3. Painting rooftops white
4. Large scale intentional transfers of plant life to non-native habitats
Some more long term projects might involve:
1. Earthquake fault lubrication
2. Orbital thin film reflectors
I think in the long run intentional large scale thorough geoengineering Geoengineering of Mars and possibly Venus is unavoidable if humanity is to survive. And pretty large scale geoengineering of earth will also likely be highly desirable and extend far beyond merely countering or counterbalancing some modest undesired climate trends of either natural or anthropogenic origin. The Amongst the possible geoengineering solutions for earth are:
1. Seeding the ocean with large but practical quantities of iron oxide to spur plankton growth and CO2 absorption
2. Cloud seeding to increase reflectivity
3. Painting rooftops white
4. Large scale intentional transfers of plant life to non-native habitats
Some more long term projects might involve:
1. Earthquake fault lubrication
2. Orbital thin film reflectors
