CEO of Germany's multinational BASF SE, the world's largest chemical producer, has warned that curbing or cutting off energy imports from Russia would bring into doubt the continued existence of small and medium-sized energy companies, and further would likely spiral Germany into its most "catastrophic" economic crisis going back to the end of World War 2.

Company CEO Martin Brudermuller issued the words in an interview with Frankfurter Allgemeine newspaper just ahead of German officials by midweek giving an "early warning" to industries and the population of possible natural gas shortages, as Russia appears ready to firmly hold to Putin's recent declaration that "unfriendly countries" must settle energy payments in rubles, related to the Ukraine crisis and resultant Western sanctions.

According to Bloomberg he mused that while "Germany could be independent from Russia gas in four to five years" it remains that "LNG imports cannot be increased quickly enough to replace all Russian gas flows in the short term."