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Since January, Vanessa Nakate has been spending Friday mornings on strike. Sometimes alone, sometimes with her friends or siblings, the 22-year-old has been protesting on the streets of the Ugandan capital, Kampala, coming in late to her job selling car batteries. She strikes at different locations around the city, one week setting up in front of a supermarket, another outside parliament buildings. But her protests have a singular focus: to draw attention to climate change and urge her government to take action.