The key is how well nations manage the spending.
A cold, divided, and annoyed Europe struggles to find a way to prevent Russia from turning down the heat. Eastern Europe, meanwhile, continues to shiver.
Concerns about Islamist threat have influenced traditionally pro-Arab Europe's view of the Israeli-Palestinian conflict.
Hamas and Israel say they are weighing an Egyptian proposal for a cease-fire as international calls to end the conflict mount.
MI5 head Jonathan Evans said Wednesday prosecutions have reduced risk. But Europe's siding with Israel on Gaza may incite European Muslims to hostility.
Bulgaria, Turkey, Greece, and Macedonia reported a complete cutoff of Russian gas Tuesday. Austria and the Czech Republic also saw a sharp drop.
Economic retreat could hamper green investment – but it could also spur a drive to move economies away from fossil-fuel dependencies.
The Russia-Ukraine gas war has left some downstream nations with only a mild shortfall, but has incited debate on how to secure energy reserves amid regional instability.
Israel has hit at hundreds of targets across Gaza but has not seriously damaged Hamas's fighting force, which continued to fire rockets on southern Israel on Sunday.