Is there any merit to the studies that show that historical CO2 levels lag behind temperature, and not lead them?
Yes, there's merit to those studies, says Peter Hildebrand, Director of the Earth Science Division at NASA's Goddard Space Flight Center, responding to a question from Twitter (https://twitter.com/Seth_b_clark/stat...).

In the pre-industrial age, the CO2 response to temperature was that the temperature would go up and CO2 would go up. Or if the temperature went down, CO2 would go down. Because when the temperature rose, the whole biosphere revved up and emitted CO2. So we understand that process.

In the post-industrial age, the opposite is true. Increasing CO2 in the atmosphere is leading to increased temperature. So two different things happened, one pre-industrial, where temperature was driving the CO2, and post-industrial, where CO2 was driving temperature. Which means a completely different physical-biological process is going on.Published on Sep 24, 2013

For more about Ask A Climate Scientist, go here: http://www.youtube.com/watch?v=49Lu1d...

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Examined Life pulls philosophy out of academic journals and classrooms, and puts it back on the streets. In Examined Life, filmmaker Astra Taylor accompanies some of today's most influential thinkers on a series of unique excursions through places and spaces that hold particular resonance for them and their ideas. Peter Singer, Judith Butler, Cornel West, Kwame Appiah and in this segment, Avital Ronel, literary critic, philosopher and feminist.

Must see.

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Today's guest, Vanessa Castle, Fish and Wildlife Technician, and member of the Lower Elwha Klallam Tribe, is featured in the Beautiful Undammed episode from the new series, Wild Hope, which will be

Today's guest, Vanessa Castle, Fish and Wildlife Technician, and member of the Lower Elwha Klallam Tribe, is featured in the Beautiful Undammed episode from the new series, Wild Hope, which will be released on YouTube on August 28th. The entire Wild Hope series will begin streaming on YouTube starting July 31 at www.wildhope.tv. Vanessa tells the story of how the local people are working with the now freed river to restore the land and the #Salmon, who carry critical marine nutrients into the #Ecosystem so that it can flourish once again. Check WildHope.tv for more information. Sign up for inspiration in your inbox at www.wildhope.tv Wild Hope is available now on PBS Nature. For more information on this series, https://bit.ly/WildHopeLaunchToolkit footage courtesy of WildHope.tv Hosts: Dale Walkonen and Sheila Laffey Editor: Chris Toussaint For more information on the state of our planet, visit the FacingFuture Library at https://facingfuture.earth/library.

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Join host Jeff Corwin on an adventure to the great state of Alaska as he explores a few of the incredible animals that call it home. Jeff begins on the shores of the icy Cook Inlet helping

Join host Jeff Corwin on an adventure to the great state of Alaska as he explores a few of the incredible animals that call it home. Jeff begins on the shores of the icy Cook Inlet helping conservationists monitor a population of endangered beluga whales. To learn more about the wildlife featured in the episode, visit www.defenders.org/wildlifenation Video Transcript: Jeff Corwin: For today's adventure, I'm traveling to America's last great frontier, the mighty state of Alaska. Alaska is a place of extremes. It is home to some of the most stunning landscapes on earth and a collection of North America's most iconic species. This morning we're exploring the massive Cook Inlet watershed located south of Anchorage. I'm joining Nicole Whittington-Evans from Defenders of Wildlife and Suzanne Steinert to help the ongoing conservation of the great white canaries of the sea. Jeff Corwin: Incredible. So we've got one beluga there and another one right here.  Nicole, when they come up, it's a flash, isn't it? Nicole Whittington-Evans: Yeah. It's just like a marshmallow surfacing on the water and then going back down. Jeff Corwin: What is bringing them here? Nicole Whittington-Evans: They're coming in to the inlet because they are following salmon. They're feeding on salmon and other fish. Jeff Corwin: The beluga whale is uniquely adapted to life in the Arctic. The absence of a dorsal fin allows them to swim under ice with ease. Their highly developed sense of hearing allows them to use echolocation to communicate with each other and navigate through the icy water that often has low visibility. Jeff Corwin: Suzanne, typically, how many belugas would we see here? Suzanne Steinert: This time of year, Jeff, we could see dozens on one tide cycle. Jeff Corwin: Nicole and Suzanne carefully count and photograph every beluga they find to monitor the health of this critically endangered population.   Jeff Corwin: In the late '80s and early '90s, Cook's Inlet was home to well over a thousand beluga whales, but today the population has plummeted by nearly 80%. What has happened to beluga whales? Nicole Whittington-Evans: In Cook Inlet, we're directly adjacent to the largest population center in Alaska. And through that, there's been a lot of habitat degradation for Cook Inlet belugas. Suzanne Steinert: There are a number of threats that are likely contributing cumulatively to preventing this population from recovering. Jeff Corwin: What is one step do you think that we could do today that would ensure their survival into tomorrow? Nicole Whittington-Evans: We really need to be thinking about how we can reduce our impacts to the climate. Suzanne Steinert: And if they're going to have any chance of survival, we've got to figure out how to better balance human and beluga needs. Jeff Corwin:  Our goal is to ensure that every generation has a chance to perch upon this rock and witness these amazing whales. Thank you guys so much. This was awesome. Nicole Whittington-Evans: Yeah, this was fantastic. There's one right there. Jeff Corwin: There is one right there.

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Carol Craig (Yakama) introduces the homelands of the Yakama Nation and describes the historic and present day relationship between her people and the food sources available within this region.
This clip is part of a series exploring the meaning of sustainability from the perspectives of indigenous leaders from the bioregion of Salmon Nation. For a complete transcript of this interview and more from the Native Perspectives on Sustainability project, visit Native Perspective Website.

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"You can't have a healthy planetary ecosystem if you don't have a healthy ocean ecosystem," says UN Special Envoy for the Ocean Peter Thomson, calling on countries, companies and individuals to

"You can't have a healthy planetary ecosystem if you don't have a healthy ocean ecosystem," says UN Special Envoy for the Ocean Peter Thomson, calling on countries, companies and individuals to reduce their greenhouse gas emissions. #SDG14 #SaveOurOcean

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10 December 2019: Hoesung Lee, head of the IPCC, speaks with UN Special Envoy for the Ocean Peter Thomson on the IPCC’s recent report on the ocean and cryosphere in the SDG Pavilion at COP25 in

10 December 2019: Hoesung Lee, head of the IPCC, speaks with UN Special Envoy for the Ocean Peter Thomson on the IPCC’s recent report on the ocean and cryosphere in the SDG Pavilion at COP25 in Madrid. Info: bit.ly/COP25SDG

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