Chinese authorities launched an investigation after a fireworks show in Tibet sponsored by the outdoor gear maker Arc’teryx sparked a backlash on social media because of concern about the effect on the environment. A video of the show was released on Saturday, triggering criticism on social media that the event contradicted the outdoor brand’s image of protecting nature. Some expressed their intention to boycott Arc’teryx products. Arc’teryx will engage a professional environmental protection agency to conduct a transparent assessment, it said in the statement. Amer owns brands including Arc’teryx and Atomic winter equipment.