School Strike for Climate: Meet 15-Year-Old Activist Greta Thunberg, Who Inspired a Global Movement

As government ministers from around the globe gather in Katowice, Poland, for the final days of the 24th U.N. climate summit, we speak with 15-year-old activist Greta Thunberg, who denounced politicians here last week for their inaction on reducing greenhouse gas emissions. She has garnered global attention for carrying out a weekly school strike against climate change in her home country of Sweden. "We need to change ourselves now, because tomorrow it might be too late," says Thunberg. We are also joined by her father, Svante Thunberg, a Swedish actor.