How can we quantify the impacts of carbon emissions on a region like the Galapagos islands and what steps can be taken to offset these emissions?  Norman Wray, former president of the governing council of the Galapagos Islands joins us this week to discuss the implications of tourism and its carbon footprint on one of the most pristine nature preserves in the world.  And how we can study these effects to understand our impact on ecosystems around the globe.