To help address the climate crisis the city of Boston is piloting the replacement of natural gas with ground-source heat pumps in a public housing project. The technology also brings clean air, cooling and heating to historically disadvantaged tenants, advancing environmental justice. Also, the warmer winters of climate disruption are bringing shorter and shorter skating seasons on the Rideau Canal in Ottawa, Canada. We head into the Living on Earth archives for a taste of days gone by, when reporter Bob Carty hit the ice to meet locals enjoying the serenity of a skate along the canal. And the oceans cover 70 percent of our “blue planet” yet remain largely unexplored because of the intense pressures at depth. But there are some intrepid few who have descended into this “underworld” and lived to tell of its marvels. -- We rely on support from listeners like you to keep our journalism strong. You can donate at loe.org – any amount is appreciated! -- and thank you for your support. Learn more about your ad choices. Visit megaphone.fm/adchoices