France's Macron says without carbon price there can be no energy transition

French President Emmanuel Macron said on Thursday the world needs to factor the environment into the costs of investment and trade and that without that there could be no transition to a greener economy.

"Taking action for the climate means regulating, and regulating at an international level. If we don’t set a price for carbon, there will be no transition," Macron told a virtual global climate summit hosted by U.S. President Joe Biden.