The man in the photo above is not a subway worker, and he's not protesting contractual differences. He claims to suffer from fibromyalgia, a syndrome that afflicts people with widespread pain and tenderness, among other symptoms.

Explaining why he was demonstrating outside Mobile World Congress, he linked this illness to "electrical pollution" -- a non-scientific term that describes the damaging effect of electricity and cellular waves on the human body. The government in Catalonia does not recognize his fibromyalgia, he said, and he is unable to claim disability benefits. He chose not to share his name.

The Big Picture is a recurring feature highlighting beautiful images that tell big stories. We explore topics as large as our planet or as small as a single life, as affected by or seen through the lens of technology.