precautionary principle

What policies lead to greenhouse gas emissions declines?

A recent study emphasizes the role of policy mixes in driving short-term emissions reductions

In a series of posts (beginning here, and ending here) last month, I outlined an approach to climate policy that emphasizes the role of subsidies in building political support and technological progress for climate policy.  In doing so, I drew heavily on existing political science research and case studies from North America and Europe.  But …

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There are Piles of Coal in America’s Christmas Stocking

Coal is piling up, unused, at powerplants across the country

Bad children, supposedly, will get only lumps of coal in their stockings. That could be taken as a metaphor for the anti-environmental programs coming down the line, but I have in mind something a bit less metaphorical. According to a recent report, coal-fired power plants have immense piles of coal – 138 million tons, equal …

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What’s at Stake in the ICJ Hearings

Representational sovereignty, Indigenous rights, and ecocide are all key to the climate obligations of states, write guest contributors Mollie Cueva-Dabkoski, Julia Phượng Nguyễn, and Molly-Mae Whitmey.

A new chapter of global climate accountability has hopefully begun, as the International Court of Justice (ICJ) prepares to issue an advisory opinion on the Obligations of States in respect of Climate Change. Hearings for that opinion began today with over 100 countries and other parties presenting over two weeks. At the request of the U.N. General …

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Earth system tipping events now seem inevitable – what does this mean for climate governance?

Graphical representation of potential climate and social tipping points report 2023

Building meaningful earth system governance creates multiple new research challenges

A tipping point is a system threshold beyond which change becomes self-perpetuating until a qualitatively different stable state is reached. For example a rainforest turns into a grassland, or an ice sheet melts completely. Such shifts are non-linear, and practically irreversible. Fears that growing human impacts might push aspects of the global climate past such …

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Florida Governor DeSantis’ Head-In-The-Sand Climate Change Policies

New Florida Law Strikes Term “Climate Change” From State Laws, Promotes Fossil Fuels & Rejects Renewable Energy Projects

Florida Governor Ron DeSantis, in coordination with an equally myopic and partisan Florida Legislature, has approved new state legislation (HB 1645) that eliminates the term “climate change” from numerous existing Florida statutes that former Republican Governor Charlie Crist signed into law in 2008. The legislation, which takes effect on July 1st, is not just symbolic: …

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The global conversation about solar geoengineering just changed at the UN Environment Assembly. Here’s how.

National flags at UNEA6 in Nairobi

Duncan McLaren and Olaf Corry reflect on the implications of the UNEA-6 non-decision on solar radiation modification for research and governance

As we wrote in part 1, a Swiss-led proposal to the UN Environment Assembly (UNEA) to establish an expert group on solar radiation management (SRM) proved divisive and was eventually withdrawn. Here we explore why, and what that means for any global conversation about SRM. SRM has long generated concerns that, as a powerful lever …

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Countries failed to agree first steps on solar geoengineering at the UN. What went wrong?

National flags at UNEA6 in Nairobi

Duncan McLaren and Olaf Corry observed as diplomats in Nairobi wrestled with a resolution on solar radiation management

In the last weeks, diplomats from all over the world were negotiating more than twenty draft resolutions at the UN Environment Assembly (UNEA). The Assembly is a biennial intergovernmental meeting which sets the global environmental agenda. It also sets the strategy for the UN Environment Programme (UNEP), and outlines policy responses to address emerging environmental …

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Cost-Benefit Analysis and Deep Uncertainty

How should agencies take into account “the things we know we don’t know”?

Since 1981, cost-benefit analysis (CBA) has been at the core of the rule making process.  OIRA, the so-called “regulatory czar” in the White House, must approve every significant regulation based on a review of its CBA.  But CBA has had a major blind spot. It embodies techniques for analyzing possible harmful outcomes when the probability …

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“NIABYs” Obstruct Important Climate Change Research

Not in my backyard

Some activists say “not in my backyard,” but strident opponents of solar geoengineering argue “not in anyone’s backyard.”

A peculiar type of activism is manifesting with regard to solar geoengineering. This proposed set of technologies to reduce climate change has been subject to only a few outdoor experiments. One has been in the pipeline for almost a decade: The Stratospheric Controlled Perturbation Experiment (SCoPEx) would involve the launch of a balloon into the …

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Guest Contributor Aimee Barnes: How the Biden Administration’s Environmental Justice Mapping Tool Can Identify and Target Benefits to Disadvantaged Communities

Lessons Learned From CalEnviroScreen

Just one week after his inauguration, President Joe Biden designated January 27 “Climate Day” at the White House and signed a number of executive orders, including one aimed to “secure environmental justice (EJ) and spur economic opportunity.” Under this executive order, President Biden took the first steps to make good on his campaign’s EJ commitments. …

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