During his state visit to the United States, French President Emmanuel Macron denounced subsidies for US products in the fight against climate change.
"These decisions will divide the West," he warned during a visit to the French embassy in Washington on Wednesday.
He had previously described the subsidies as "super aggressive" towards French companies at a lunch with US parliamentarians.
The US might be able to solve its problems with it, "but you will increase my problem," he said over lunch.
Without coordination between the US and the EU, "many jobs are at risk of being destroyed," Macron said.
"I only ask to be respected as a good friend."
US relationship 'stronger than anything else'
In his speech at the embassy, he later added that the subsidies create "such differences between the US and Europe" that many companies are discouraged from investing in the US.
Despite his criticism, he called the France-US relationship "stronger than anything else".
The dispute revolves around US President Joe Biden's multi-billion dollar climate protection and social package, known as the Inflation Reduction Act (IRA), passed in August.
The package provides $370 billion (around €357 billion) for climate protection and energy security - the largest investment in the fight against global warming in US history.
Among other things, subsidies for electric cars, batteries and renewable energy projects “Made in the USA” are planned.
The subsidies are met with massive criticism in the EU.
It is feared that European companies will be disadvantaged.
Federal Minister of Economics Robert Habeck (Greens) announced possible “robust countermeasures” by the EU on Wednesday.
The dispute is likely to be a central topic of talks between Macron and Biden on Thursday in the White House.
The French head of state arrived in the United States on Tuesday evening for a state visit lasting several days.