Book excerpt: The climate crisis is the issue of our time. Scientists have warned for over 100 years that burning fossil fuels and destroying nature will warm the earth's atmosphere and affect the climate in adverse ways: more severe and intense storms, prolonged heat waves, drought, flooding, wildfires, rising sea levels and ocean acidification. Urgent Message from a Hot Planet: Navigating the Climate Crisis outlines the science behind global heating and its root causes, provides ways to take action and honors the efforts of the millions of youth and adult allies from around the world working tirelessly to make a difference. Their powerful message: do something now!