The European Commission on Wednesday called for international talks on the dangers and governance of geoengineering, saying such interventions to alter the climate posed "unacceptable" risks.
Geoengineering has attracted increasing interest as countries fail to cut greenhouse gas emissions fast enough to curb climate change. But the issue of manipulating planetary systems to fight global warming remains highly controversial.
"Nobody should be conducting experiments alone with our shared planet," European Union climate policy chief Frans Timmermans told a news conference.
"This should be discussed in the right forum, at the highest international level."
Geoengineering techniques include directly removing CO2 emissions from the atmosphere. The first plants to do this are already in operation, capturing CO2 in tiny quantities compared with countries' emissions.
Also read |What is solar geoengineering?
More controversial is solar radiation modification (SRM), which would cut the amount of sunlight reaching Earth's surface by, for example, spraying sulphate aerosols into the stratosphere to reflect more light back into space.
In an explanatory document the Commission said that, in its current state of development, SRM "represents an unacceptable level of risk for humans and the environment".
Timmermans suggested the United Nations as a potential venue for talks on the risks and possible use of geoengineering, with the aim of ensuring all countries had a say.
The EU is funding two projects to assess geoengineering techniques, but said neither would develop or test SRM. It said such techniques cannot solve climate change, because they fail to address its root cause - the greenhouse gas emissions heating the planet.
SRM has split opinion among scientists.
More than 100 scientists signed a February letter in support of research to understand whether SRM could reduce the immediate danger of global warming while countries attempt to cut their outright emissions.
Other scientists have called for a ban on solar geoengineering, arguing that it would be impossible to govern and could unleash unpredictable impacts, including on the weather and agriculture.
Published - June 28, 2023 10:20 pm IST
