Former U.S. energy secretary warns that the U.S.-EU gas deal won't be sufficient to replace Russian supply.

• In 2021, Russia was the source of 155 billion cubic meters of natural gas imported by the European Union, as per the International Energy Agency.
• On Monday, former U.S. energy secretary Dan Brouillette stated that he was unsure if everyone could cover the shortfall with such a large amount of gas.
• If Europe wants to reduce its reliance on Russian gas, private industry and governments must fill the gap, as the gas deal is "very important," according to Brouillette.

On Monday, former U.S. energy secretary Dan Brouillette stated that the gas deal between the U.S. and EU is significant, but it won't be enough to compensate for the shortfall from Russia.

The US announced plans to collaborate with international partners to increase LNG exports to Europe by at least 15 billion cubic meters in 2021. In 2021, the EU imported 155 billion cubic meters of natural gas from Russia, according to the International Energy Agency.

He stated that it was uncertain if everyone could cover the significant gas shortfall, which was a large amount.

If Europe wants to reduce its reliance on Russian gas, private industry and governments must fill the gap, as the gas deal is "very important," according to Brouillette.

To support the shift away from Russian energy in the short run, he suggested that Germany should also construct regas facilities to convert LNG from liquid into gas.

Brouillette stated that in the long run, Europe must utilize diverse energy sources to achieve its carbon emissions objectives.

He stated that the history of energy has always involved a transition from less to more, in contrast to replacing one form of energy generation with another, such as switching from burning fossil fuels to using wind or solar power.

In order to sustain the economic growth desired by all these countries, including the United States, we must prioritize increasing energy production, rather than reducing it.

He stated that providing energy security would also ensure national security for countries.

— CNBC’s Sam Meredith contributed to this report.