Geo-engineering is opposed by many environmentalists, who say the technology could undermine efforts to reduce emissions, and by developing countries who fear it could be used as a weapon or by rich countries to their advantage. In 2010, the UN Convention on Biological Diversity declared a moratorium on experiments in the sea and space, except for small-scale scientific studies.
Concern is now growing that the small but influential group of scientists, and their backers, may have a disproportionate effect on major decisions about geoengineering research and policy.
"We will need to protect ourselves from vested interests [and] be sure that choices are not influenced by parties who might make significant amounts of money through a choice to modify climate, especially using proprietary intellectual property," said Jane Long, director at large for the Lawrence Livermore National Laboratory in the US, in a paper delivered to a recent geoengineering conference on ethics.
"The stakes are very high and scientists are not the best people to deal with the social, ethical or political issues that geoengineering raises," said Doug Parr, chief scientist at Greenpeace. "The idea that a self-selected group should have so much influence is bizarre."