Astronomical Victory: Chile Scraps $10bn Project Endangering Pristine Skies
In a landmark decision for global science, Chile has formally cancelled a massive $10bn industrial project that threatened to irreparably damage the clearest skies on Earth in the Atacama Desert. The proposed INNA facility, a green hydrogen and ammonia production plant, was withdrawn after intense lobbying from astronomers who warned it would compromise world-leading observatories.
Project Details and Environmental Concerns
The INNA project, under evaluation for nearly a year by Chile's environmental regulator, spanned 3,000 hectares and included a port, transport links, and three solar power plants. Scientists raised alarms that its proximity to major telescopes would increase light pollution, cause ground vibrations affecting instruments, aerialise dust settling on telescope mirrors, and heighten atmospheric turbulence. Itziar de Gregorio, the European Southern Observatory's representative in Chile, stated, "This cancellation means the INNA project will no longer have a negative impact on the Paranal Observatory." However, she emphasised the ongoing need for protective measures around astronomical sites.
Scientific Impact and Global Significance
Chile's Atacama Desert hosts some of the world's most powerful telescopes, including the Very Large Telescope (VLT) at Paranal, which has contributed to three Nobel prizes, and the under-construction Extremely Large Telescope (ELT) on Cerro Armazones. The ELT, set to be the largest ground-based telescope, aims to search for Earth-like exoplanets in distant galaxies. An open letter led by Nobel laureate Reinhard Genzel highlighted the facility's planned location just 11.6km from Paranal, urging the Chilean government to halt the project due to potential catastrophic effects on astronomical research.
Corporate Response and Future Implications
AES Andes, the subsidiary of US-based AES Corporation that proposed the project, announced its withdrawal after a portfolio review, claiming compatibility with other activities in the area. Despite this, astronomers argue the cancellation underscores the urgency of safeguarding Chile's skies from industrial encroachment. The decision follows Chile's environmental evaluation service confirming the project's formal withdrawal after recent meetings with AES Andes, marking a critical win for the scientific community but highlighting persistent threats to astronomical observation.
