Balloon test flight plan under fire over solar geoengineering fears

Swedish environmental groups warn test flight could be first step towards the adoption of a potentially dangerous, unpredictable, and unmanageable" technology

A proposed scientific balloon flight in northern Sweden has attracted opposition from environmental groups over fears it could lead to the use of solar geoengineering to cool the Earth and combat the climate crisis by mimicking the effect of a large volcanic eruption.

In June, a team of Harvard scientists is planning to launch a high-altitude balloon from Kiruna in Lapland to test whether it can carry equipment for a future small-scale experiment on radiation-reflecting particles in the Earth's atmosphere.