To get a free copy of the Infectious Generosity book, visit ted.com/generosityWhat if the world’s biggest problems could be solved with just some simple math? Natalie Cargill, the founder of strategic giving consultancy Longview Philanthropy, works on finding funding for the most impactful solutions to global issues. In an exciting chat, Natalie and Chris talk about the numbers on what it takes to solve extreme poverty, how to prevent the next pandemic and what kind of money it takes to mitigate other risks to our planet. Transcripts for The TED Interview are available at: go.ted.com/TTIscripts