A proposed resolution falters at the UN Environment Assembly
At this week’s UN Environment Assembly, countries’ representatives debated a draft resolution regarding climate geoengineering. Unable to come to agreement, it was withdrawn Wednesday. This is not surprising to me, as — for the most part — leaders presently lack political incentives to take action. I am also not particularly disappointed, because a counter-productive resolution seemed fairly …CONTINUE READING
A misleading new report from Center for International Environmental Law and the Heinrich Boell Foundation demeans the discourse
Geoengineering is controversial in the climate change community, and understandably so. Proposed interventions like negative emissions technologies (a.k.a. carbon dioxide removal) and solar geoengineering (a.k.a. solar radiation management or SRM) — which some writers group together as “geoengineering” — involve large-scale intervention in the climate system that could have adverse physical or social impacts. At …CONTINUE READING
Solar geoengineering is often inaccurately portrayed in the media
If you had followed the climate change news over the weekend, you might have been shocked to see headlines such as “Scientists Prescribe a Healthy Dose of Sulphate Particles to Promote Global Cooling on the Cheap.” CNN tweeted that “Harvard and Yale scientists are proposing that we tackle climate change by dimming the sun.” And …CONTINUE READING
May states intentionally alter the entire planet’s climate?
A couple weeks ago, I introduced solar geoengineering (see also 1, 2, 4 in the series). This is a set of proposed technologies that would reduce climate change by blocking or reflecting a small portion of incoming sunlight. It appears that it would be effective in reducing climate change, inexpensive, rapid, and technically feasible. It would …CONTINUE READING
What does the scaling-up of negative emissions technologies for environmental law?
In my previous posts , I described how most emissions scenarios that are expected to keep warming within 2 or 1.5°C rely on negative emissions technologies (NETs) at large scales and how the new report from the Intergovernmental Panel on Climate Change addresses NETs (as well as how solar geoengineering could offer an additional means to …CONTINUE READING
Did the IPCC bury the lede regarding solar geoengineering?
In my previous posts on the reports of the Intergovernmental Panel on Climate Change (IPCC), I described how models assume the use of uncertain negative emissions technologies at very large — if not impossible — scales in order to keep global warming within 1.5 or two degrees Celsius (1, 2; see also my colleague Julia …CONTINUE READING
The new Intergovernmental Panel on Climate Change report on 1.5°C warming relies heavily on negative emissions technologies.
Last week, I described how the scenarios expected to keep global warming within the 2°C target, which was internationally endorsed in the Paris Agreement, had to assume the use of negative emissions technologies at very large scales. The Intergovernmental Panel on Climate Change (IPCC), an international assessment body, downplayed this essential fact in its most recent major report, …CONTINUE READING
If we probably cannot keep global warming within agreed-upon limits by reducing emissions alone, how could we?
Next week, the international body responsible for assessing climate change will release a special report on the 1.5°C target, an ambitious, international goal to limit global warming that became part of the Paris Agreement in 2015. The report might mark a significant turning point for how policy makers, the scientific community, and others think about …CONTINUE READING