Climate change sceptics from Brussels have written in support of President Trump
The letter congratulates the Republican on his election victory last year, before reiterating the group's commitment to the Transatlantic Alliance.
The MEPs hailed President Trump's "very positive impact" since being sworn into the White House, in particular his plans to protect America's energy industry.
And they urged him to make good on his promise to withdraw the US from the from the 2015 Paris Agreement, an accord which seeks to drastically cut global carbon dioxide emissions and which was signed by almost 200 nations.
The President is reportedly reconsidering his commitment to pulling out of the agreement, amid calls from several big US coal companies to keep the pledge.
They argue the only way to advance the argument for coal in the future global energy market is to retain a seat at the negotiating table, rather than be dictated to by Europe.
But the letter from Brussels advises President Trump to pull out of the agreement as it would "effectively neuter it, to the benefit of us all".
The letter reads: "We particularly applaud the new realism which you personally have brought to the climate issue and to energy policy.
"We recognise the very positive impact which your decisions will have in ensuring the availability of secure and affordable energy in the USA, underpinning American competitiveness. We on our part are pressing for similar policies on this side of the Atlantic.
"We recall your campaign pledge to withdraw the USA from the Paris Climate Treaty, and we would urge you to put this into effect with as little delay as possible.
"We believe that the Paris agreement is potentially damaging, especially to developed western economies. We also believe that an early decision by your Administration to pull out of the Paris agreement will effectively neuter it, to the benefit of us all."
The Paris Agreement in 2015 was viewed as an historic global warming pact
The letter concludes with another plea for the president to withdraw Environmental Protection Agency's findings on carbon dioxide endangerment, which the MEPs claim "has no sound basis in science, but which provides a pretext for damaging and extreme environmental policies".
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The letter is signed by 10 UKIP MEPS, including Roger Helmer the party's spokesman on energy and industry.
Beatrix Von Starch, a member of the right wing Alternative for Germany party and Diane James, a former UKIP-turned independent MEP, are also signatories.