President Donald Trump's words and actions are restricting global efforts to cut carbon, according to a new study.
The analysis says the US' withdrawal from the Paris climate agreement has created the political cover for others to go slow on their commitments.
Trump: Climate scientists have 'agenda'
Dire warning on US climate change impacts Trump dismisses US climate change report President Trump has justified pulling his country out of the landmark climate agreement by asserting that he was elected to serve the citizens of Pittsburgh and not Paris.
However, other international leaders promised that there would be no going back, and that the US pull-out would galvanise efforts to cut carbon.
The sense of unity was underlined in November 2017 when Syria signed the Paris agreement, leaving the US alone in the world as the only country rejecting the deal.
The author says that the US withdrawal from Paris has created the «moral and political cover for others to follow suit», citing the examples of Russia and Turkey - which have both declined to ratify the Paris deal.
The US pull-out has also «severely damaged goodwill at international negotiations», something that's crucial to progress in these talks here in Poland.
When it comes to fossil fuels, the author cites the example of investments in the coal sector by 36 US banks, which saw a decline of 38% in 2016 after the Paris agreement was signed, but which rose by 6% in 2017 after President Trump was sworn in.
«This is not a coincidence, there is something underpinning these trends and that's political signals,» said Joseph Curtin, a senior fellow at the IIEA.
«The Paris agreement sent a shiver down the spine of institutional investors globally and made them question if they were exposed to stranded assets and whether these political leaders were really serious about climate change».
«There's absolutely no doubt that the Trump effect has created a sense of uncertainty in terms of the political commitment to achieve anything close to a two degree C target».
While the EU, China and India have promised to take more ambitious steps to bolster the Paris agreement, study author Joseph Curtin believes they will be reluctant to take major steps without the participation of the US.
«There's no way that the big player will upgrade their ambition without some sort of quid pro quo from the US,» he told BBC News.
«The likelihood that they will take on more ambitious pledges in the short term has certainly been damaged».
However, some of those involved in the UN climate process argue that to focus on the impacts of Trump is mistaken.