Alison Gannett pauses on her Karakoram Mountain expedition to talk with Balti guide Sharif about a key solution to global warming, eating local, organic food - the way it's been done for thousands of years - in the Shigar Valley of Pakistan. If you have some knowledge to share or a question about this topic, we'd love to see your comments in the space below. You can also learn more at www.chasingglaciers.com.
