"Please put a price on carbon," Enel Chief Executive Francesco Starace said in an interview at the Reuters Impact conference.
Starace's comments come less than four weeks before the U.N. COP26 climate talks in Scotland that aim to secure bolder action from the nearly 200 countries that signed the 2015 Paris Agreement to try to limit global warming to 1.5 Celsius.
He said the world was on track to overshoot 1.5C at the moment and it was important to see if larger economies, with their new and more focused efforts, would engage with the target at the COP26 talks, which start on October 31.
"Put the price on carbon in your own territory ... and then worry about how that carbon price relates to the other carbon prices," Starace said. "But price it - because if you start with that then this will finally adjust."
Carbon pricing is seen by many as key to encouraging emissions reductions and helping new, low-carbon technologies compete with established, more-polluting sources of energy.