Geoengineering refers to a set of emerging technologies that could manipulate the environment and partially offset some of the impacts of climate change.
Some of the geo-engineering techniques are:
1. Increased reflectivity from low clouds (spraying sea salt).
2. Ocean fertilisation (by increasing the population of carbon-absorbing plankton).
3. Increased reflectivity from the oceans (microbubbles increases reflectivity).
4. Biomass energy with capture and storage.
5. Thinning high clouds.
6. Increased reflectivity of crops (genetically modified crops?)