US President Donald Trump has announced the reversal of the endangerment finding, a key Obama-era scientific ruling underpinning US environmental legislation.

This decision by the U.S. Environmental Protection Agency (EPA) is expected to face legal challenges from environmental groups. The potential impacts of this reversal are significant and varied.

Fewer Greenhouse Gas Emissions Restrictions

The most immediate effect will be a reduction in restrictions on greenhouse gas emissions, particularly for vehicle manufacturers. The endangerment finding identified various greenhouse gases as harmful to future generations, resulting in stricter regulations post-2009.

With this ruling gone, experts estimate an additional 7.5-18 billion tonnes of greenhouse gases could be emitted by 2055, ultimately costing society trillions of dollars in damages.

Cheaper Cars in the US, but Export Complications

While the removal of the endangerment finding is said to lower vehicle manufacturers' costs, it may complicate export operations. Policies that improved fuel efficiency are being rolled back, leading to lower production standards compared to international competitors.

Increase in Nuisance Lawsuits

With the EPA losing oversight on emission regulations, experts predict a resurgence of public nuisance lawsuits targeting companies responsible for pollution.

Public Health Risks

The EPA claims that reducing emissions standards does not impede their mission of protecting public health. However, research indicates that increased emissions could lead to tens of thousands of premature deaths and millions of asthma attacks by 2055.

Falling Behind in the Global Renewables Race

The policy change raises concerns about the U.S.'s future competitiveness in renewable energy. Experts claim that while the U.S. retreats from environmental standards, other countries are advancing rapidly in clean technologies.

Less Industry Regulation

Despite arguments for potential economic benefits, environmental advocates warn that Trump’s deregulation may ultimately hurt long-term sustainability and public health.