Global Warming's Direct Impacts Rise, But Extreme Weather Isn't – Risk Assessment Explained

A significant shift in climate change regulation occurred recently, as a long-standing finding regarding the endangerment posed by greenhouse gases was reversed. This decision impacts how the United States assesses and addresses the risks associated with climate change, potentially leading to billions of extra tonnes of greenhouse gas emissions over the next three decades.

The Reversal of the Endangerment Finding

The core of the change lies in overturning a 2009 decision. That original finding stated that carbon dioxide, methane, and four other greenhouse gases represent a threat to human health, and welfare. The reversal challenges existing climate science and its implications for regulation.

Did You Know? The initial endangerment finding, issued in 2009, identified six greenhouse gases as pollutants endangering public health.

What Does This Mean for Regulation?

The decision to reverse the endangerment finding has substantial implications for environmental regulation. The Environmental Protection Agency (EPA) had previously used this finding as a basis for regulating greenhouse gas emissions from vehicles, power plants, and other sources. The EPA determined that these gases are considered “air pollutants” as defined by the Clean Air Act.

Expert Insight: Reversing the endangerment finding represents a fundamental shift in the regulatory approach to climate change, potentially weakening the legal basis for emissions controls and slowing efforts to mitigate global warming.

Potential Future Scenarios

Following this reversal, analysts expect potential challenges to existing climate regulations. We see likely to lead to debates about the scientific basis for climate action. A possible next step could involve legal challenges to the EPA’s decision, as well as scrutiny of the data used to support the reversal. The United States is one of the world’s largest greenhouse gas emitters, and regulating those emissions is critical.

Frequently Asked Questions

What was the original endangerment finding?

The original finding, issued in 2009, stated that carbon dioxide, methane, and four other greenhouse gases threaten human health and welfare.

What is the significance of reversing this finding?

Overturning the 2009 decision is expected to lead to billions of extra tonnes of greenhouse gas emissions over the next three decades.

What gases were included in the original finding?

The finding included carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, perfluorocarbons, and sulfur hexafluoride.

How might this decision affect the future of climate policy in the United States?

Global Warming’s Direct Impacts Rise, But Extreme Weather Isn’t – Risk Assessment Explained