Thunberg says she first heard about climate change in 2011, when she was 8 years old, and could not understand why so little was being done about it.[12] Three years later she became depressed and lethargic, stopped talking and eating, and was eventually diagnosed with Asperger syndrome,[13] obsessive–compulsive disorder (OCD),[13] and selective mutism.[13][14] While acknowledging that her diagnosis "has limited me before", she does not view her Asperger's as an illness and has instead called it her "superpower".[14]
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