This World Health Organization fact sheet, “Climate change and health,” is included in Part 1: The Purposeful Investor because it provides authoritative, human‑centred evidence of climate urgency—documenting that between 2030 and 2050 climate change could cause roughly 250,000 additional deaths per year, that some 3.6 billion people live in highly vulnerable contexts, and that impacts are deeply inequitable—thereby underscoring the book’s themes of urgency and agency. The WHO’s call to limit warming to 1.5°C and to build climate‑resilient health systems directly supports the Chapter “Call to Action: Our World & Our Future,” and the source’s focus on health system risks and adaptation frames the financial implications and investment opportunities highlighted in the row’s "Why read" note. (Author/Organisation: World Health Organization; URL verified.)