US President Donald Trump has revoked a critical global warming ruling made during the Obama administration, which stated that certain greenhouse gases pose a danger to public health. This 2009 'endangerment finding' had been instrumental in shaping federal regulations aimed at reducing emissions, especially in the automotive sector.

The White House heralded the rollback as the largest deregulation in American history, promising that it could lead to significant economic benefits, including a decrease of approximately $2,400 from the cost of each vehicle produced. Environmental groups are raising alarms, however, arguing that this action represents a significant regression in climate change efforts and may result in increased public health issues.

Speaking in the Oval Office, Trump described the previous ruling as a disastrous Obama-era policy that he claims harmed the American auto industry and inflated consumer prices. Furthermore, he criticized what he termed the Green New Scam, referring to the broader Democratic climate agenda.

In reaction to the decision, former President Barack Obama stated that the repeal would increase vulnerabilities, rendering Americans less safe and healthy while undermining efforts to tackle climate change effectively. Environmentalists warn that the rollback will lead to higher gas prices, increased emissions, and an estimated surge in premature deaths and health problems, including asthma attacks, tackled by new, less efficient vehicles.

As the administration defends its move, legal challenges loom. Experts predict that states and non-profit organizations may pursue litigation to assert stricter regulations in light of the rollback, questioning the scientific validity while much debate continues over its implications for future climate policies.