Greta Thunberg: Climate Activist 

As climate change emerged as a major environmental issue, a teenager from Sweden stepped forward as a most unlikely leader of the movement to convince world leaders that the time to act is now. Greta Thunberg has spoken before United Nations delegates, challenging them to reverse the effects of climate change. Her bravery has electrified an international movement composed mostly of young people who fear for their future if climate change is not contained.