Watch all the Sustainability YTOs here:    • Sustainability | YouTube Originals   How badly is our planet heating up? I’ve put together an experiment that asks: How much of an olympic-sized swimming pool would be filled with glacial meltwater in the time it takes to ski down a glacier? Helping me - by actually skiing down a glacier - is JT Holmes. And you won’t believe the final answer. To see everything that YouTube and Google are doing to create a more sustainable Earth, please visit http://sustainability.google/