negative emissions – Healthy Planet Action Coalition

1 degree C warming above normal 30 degrees north and south 350 ppm CO2 aerosols albedo Arctic refreezing atmospheric greenhouse gas concentration carbon burden carbon cycle response Carbon removal climate restoration climate triad clouds Cooling intervention governance implementation direct air capture Earth systems Earth's energy imbalance Engineered cooling Engineered cooling scenarios engineered cooling strategy response geoengineering Marine cloud brightening natural feedback emissions natural geoengineering negative emissions Ocean acidification Ocean response presentation Risk-Risk Analysis sequestration ship's fuels regulations solar radiation modification SRM stratospheric aerosols Temperature response threshold crossing tipping tropospheric aerosols warming in the pipeline

Global Heating Emergency Conference by HPAC, October 15 and 16, 2025

https://youtu.be/OTlZ4lQ5Evc?si=jUFm4ufvhsmL6knr Global Heating Emergency Conference by HPAC, October 15 and 16, 2025 Global Online Conference • October 15 – 16, 2025 (https://www.preventing2degrees.org) Description: In Paris in 2015, 195 countries committed to stopping global warming. But greenhouse gas emissions have continued to relentlessly increase. The latest science shows…

HPACAdminDecember 5, 2025

atmospheric greenhouse gas concentration carbon balance carbon burden Carbon Capture and Storage Carbon removal carbon sinks climate restoration climate triad direct air capture Earth systems Engineered cooling engineered cooling strategy response geoengineering natural geoengineering negative emissions presentation sequestration solar radiation modification SRM stratospheric aerosols

Paul Gambill – New Initiatives to Support Comprehensive Approaches to Controlling Global Heating, HPAC, November 13, 2025

https://www.youtube.com/watch?v=qK_dMzE7m5Q Paul Gambill - New Initiatives to Support Comprehensive Approaches to Controlling Global Heating, HPAC, November 13, 2025 Paul Gambill will be joining us to discuss his work on educating the public to understand that sunlight reflection methods will be needed in addition to emissions reductions and greenhouse…

HPACAdminNovember 13, 2025

Carbon Capture and Storage Carbon removal carbon sinks climate restoration Earth systems Engineered cooling geoengineering natural geoengineering negative emissions Ocean acidification Ocean response ocean strategies presentation

Russ George – Ocean Iron Fertilization, HPAC, October 2, 2025

https://www.youtube.com/watch?v=JuaKbReiYAM Russ George - Ocean Iron Fertilization, HPAC, October 2, 2025 In 2012, Russ George worked with the Haida Salmon Restoration Corporation in British Columbia to add iron to the waters of the North Pacific Ocean at the point where salmon fingerlings most needed food. The project encountered…

HPACAdminOctober 2, 2025

Amazon Boreal forest Carbon removal negative emissions tipping

Munday, May 12, 2025 – Amazon and boreal forest tipping: 1.5 C is too warm…

Summary: The only way to stop collapse of the Amazon according to this studies modeling, is to reduce the temperature from today to below 1.5 C. Then and only then will tree mortality stabilize. Temporarily overshooting 1.5 C see forest loss continue for centuries because of degradation feedbacks.…

HPACAdminMay 15, 2025

1 degree C warming above normal 350 ppm CO2 Carbon removal climate restoration clouds Earth's energy imbalance Engineered cooling natural feedback emissions negative emissions ship's fuels regulations solar radiation modification SRM stratospheric aerosols tipping

Hansen et al., Global Warming Has Accelerated: Are the United Nations and the Public Well-Informed? Review by Bruce Melton PE

Hansen 2025 - review by Bruce Melton, Climate Change Now Initiative Summary - Hansen's 350 ppm CO2 and 1 degree C warming target is on full display where he repeatedly asserts that acceleration of warming and effects now implies that engineered cooling solutions are required to avoid untenable…

HPACAdminFebruary 20, 2025

1 degree C warming above normal 350 ppm CO2 Carbon removal carbon removal reduces natural feedback emissions climate restoration negative emissions

Carbon removal reduces natural feedback emissions – Hansen 2017

Hansen 2017… shows that reducing atmospheric burden, has a feedback effect where natural systems feedback emissions are also reduced by up to several hundred Gt C. Selected quote, "Studies suggesting multi-meter sea level rise in a century assume continued high fossil fuel emissions this century (Hansen et al.,…

HPACAdminAugust 2, 2023