The basis for American regulations aimed at reducing greenhouse gas emissions was laid down in 2009 under President Barack Obama, identifying six specific greenhouse gases that were deemed harmful to public health and contributing to climate change. This framework has guided federal policy on environmental issues for over a decade. Recently, Trump and the Environmental Protection Agency (EPA) announced the formal abrogation of this foundational policy.

In conjunction with the repeal, the EPA is also proposing to delay a decision made during Biden's administration regarding the imposition of a cap on vehicle emissions by two years. This suggested delay indicates a broader shift in environmental policy and approaches towards climate change under the current administration. Critics warn that these changes could hinder efforts to combat climate change and could have significant long-term impacts on public health and the environment.

The implications of Trump's decision are far-reaching, as it not only dismantles previous regulations but also signals a potential reversal of progress made in US climate policy over the last decade. Observers are concerned that this could undermine international commitments to climate agreements and slow down progress in addressing global climate change challenges.