"My goal is to deliver a strong message from the summit, in which leaders of the G20 would recognize their huge responsibility for the world, and assume their responsibility", she said.
"Whoever believes that you can solve problems through isolation and protectionism is making a grave error".
"Since the USA announced that it would exit the Paris agreement, we can not expect any easy talks in Hamburg", Merkel said, referring to the Group of 20 summit scheduled for July 7-8. "Obviously, we see things differently", she added. "That I won't do", she said, adding that the United States exit from the 2015 Paris pact had made Europe "more determined than ever" to make the accord a success.
Despite the withdrawal of the United States, the world's second-largest polluter, the European Union remains committed to the Paris climate accord, she said. She is hosting Macron in Berlin on Thursday along with European leaders including the U.K.'s Theresa May and Paolo Gentiloni of Italy to align their position ahead of the G-20.
"And for me personally, I hope that the others can be brought back to their senses", he added.
Germany Thursday said it had turned down Erdogan's request to make a speech to ethnic Turks on the sidelines of the G20, sparking criticism from Ankara and threatening another headache for the host country. She has been straining to unite European neighbors around free-trade and climate-friendly policies as a counterweight to United States President Donald Trump. In an interview with weekly magazine WirtschaftsWoche, Merkel said Europe needed to be wary about opening its markets to products that had been developed with public subsidies in China and should demand reciprocity on access to public tenders.
"It's pointless to isolate a country", he said.
Speaking after meetings with her counterparts from France, Italy, the Netherlands, Spain and Norway, and EU representatives, Merkel said Thursday she "regrets" the USA decision but that the European G-20 participants are "united" in their support for the agreement. "But we will obviously also address issues of climate change during the summit meeting".
"It's very important to voice disagreement sometimes, and to not cede when defending the right position such as in the case of the climate". The head of Government has the intention to analyze with her partners the main topics of the summit: free trade, rejection of protectionist measures, climate change, migration and refugees, in order to go deep into other points agreed by consensus, according top Government sources.