Activists in Amsterdam targeted a Microsoft-linked data center project, throwing acid-filled balloons over the perimeter fence at the site near Sloterdijk Station. Extinction Rebellion said the balloons contained a corrosive mix—hydrogen peroxide, acetic acid, salt, and acrylic paint—intended to weaken concrete and speed rusting. Pure Data Centres said responders confirmed the balloons were thrown but reported no construction damage, and it plans legal action. The group framed the protest as part of a broader campaign against AI data centers and their environmental footprint.