(Bloomberg) -- Russia’s oil and gas industry has been crucial for bankrolling the invasion of Ukraine, giving the Kremlin the funds to keep fighting even as the conflict drags on through its third year. But the industry is facing a shortage of manpower as the full mobilization of Russia’s economy for war exacerbates a longstanding demographic crunch.Most Read from BloombergTruce Talks Drag as Hamas Hits Israel Crossing in Deadly AttackFrance’s Macron Calls for Reset of Economic Ties With ChinaBu