Following the G7 summit, which concluded at the weekend, Mr Trump has said he needs more time to decide if the United States would continue to back the Paris climate deal.
"We live in a globalised world and India.is a partner", she said.
Mr Modi declared that "the world needs a strong leadership, which is demonstrated by Chancellor Merkel".
Merkel, invoking her background as a scientist and a veteran of more than 20 years of worldwide efforts to protect the planet, noted that it was especially important to help developing nations meet the challenges of global warming.
"Anyone who accelerates climate by weakening environmental protection, who sells more weapons in conflict zones and who does not want to politically resolve religious conflicts is putting peace in Europe at risk", he said on the sidelines of the third Berlin roundtable discussion on refugees and migration Monday. "We believe our political foundations make an important contribution and I am pleased that all our bureaus in China can be registered and hope they can resume work", she said. India, with 800 million youth and 65 per cent of the population under the age of 35, will be benefited by skills development that Germany can provide, he said. "Prime Minister Modi arrives in Madrid, first visit by an Indian Prime Minister in almost three decades, is received by Spanish FM in a special gesture", said Gopal Baglay, spokesperson for the Ministry of External Affairs in a tweet.
During their talks, the two leaders also expressed their commitment to strengthen global non-proliferation efforts.
China, which overtook the United States as the world's biggest emitter of greenhouse gases in 2007, is ready to support the EU, despite tensions on other issues from human rights to trade, according to China's ambassador to the EU, Ms Yang Yanyi.More news: Zidane keeping mum on Bale ahead of final
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"If US-China climate cooperation gave birth to the Paris Agreement, now it is up to European Union and China to defend and enhance it", said Li Shuo, climate policy advisor of Greenpeace East Asia.
In defending his decision, Trump said that "I was elected to represent the citizens of Pittsburgh, not Paris".
The investment deal will benefit the two-way opening-up of the Chinese and European Union markets and promote trade liberalization and investment facilitation, Li said.
The signing ceremony for the MoUs took place at the Chancellery, the office of the German Chancellor, between senior Indian and German ministers and envoys before Modi and Merkel addressed the media.
The last IGC was held in New Delhi in October, 2015, when bilateral ties were significantly scaled up.
Describing Germany as among India's "most important partners" globally, which is the 7th largest source of foreign direct investment (FDI) into India, the Prime Minister cited the examples of German majors in India.