(The fund had $55 million)
"Now the world must show its colours," Merkel told the fifth informal meeting in Berlin of representatives of 35 countries, which was held to discuss a new climate change treaty.
"Every delay comes at a high cost," she said.
The 750 million euros form part of Germany‘s contribution to build up the green climate fund, which has been set up to help developing nations address climate change. Germany has spent 3.2 billion euros in recent years on efforts to tackle climate change.
"In Germany we are accepting our responsibility," the chancellor told the meeting, which is known as the Petersberg Climate Dialogue and which was created to overcome differences in the international community so that a new accord can be signed by the end of 2015.
The United Nations-sponsored green climate fund hopes to raise up to 100 billion dollars a year by 2020 to help with the promotion of climate-friendly businesses and to boost renewable energy.