HAMBURG, Germany — Leaders of the world’s top economic powers reaffirmed their support Saturday for free trade but tempered their statement by acknowledging countries could defend their home companies and markets against unfair practices.

The Group of 20 summit came up with compromise language on trade, although officials struggled to find common ground on another contentious issue, fighting climate change.

In the wake of President Donald Trump’s decision to leave the Paris climate agreement, the group agreed in a draft statement to “take note” of the U.S. withdrawal while the other 19 reaffirmed support of the Paris deal to limit emissions of greenhouse gases scientists say are behind global warming.

Officials at the summit, who briefed reporters on condition of anonymity because they weren’t authorized to discuss the final statement before its release, said the language had been generally agreed on except for part of the climate section.

The talks at the two-day summit in Hamburg competed for attention with violent clashes between antiglobalization activists and police.

Climate and trade were two of the most contentious issues. Trump has said trade must be fair as well as open and must benefit American companies and workers.

The G-20 typically denounces protectionism, or the use of unfair means to keep out foreign competitors and protect domestic workers and companies. That stance has been kept, but it has been expanded to include references to the use of “legitimate trade defense instruments” when a country is faced with subsidized or otherwise unfair competition from a trade partner.

The G-20 comprises Argentina, Australia, Brazil, China, Germany, France, Britain, India, Indonesia, Italy, Japan, Canada, South Korea, Mexico, Russia, Saudi Arabia, South Africa, Turkey, the U.S. and the European Union. The Netherlands, Norway, Spain, Guinea, Senegal, Singapore and Vietnam are also attending.