On this edition of Your Call’s One Planet Series, we're discussing the disproportionate effects of climate driven extreme heat on the most vulnerable groups, including farmworkers, low-income communities, and the elderly. By midcentury, given slow or no action to reduce global heat-trapping emissions, the increased intensity, frequency, and geographic extent of extreme heat would cause a three- to fourfold increase in the exposure of outdoor workers to days with a heat index—or “feels like” temperature—above 100°F, the point at which the CDC recommends that work hours begin to be reduced, according to the Union of Concerned Scientists. Guest: Dr. Kristina Dahl, climate scientist for the Climate & Energy program at the Union of Concerned Scientists