MARCELLUS/UTICA REGION: Metcalfe announces legislative retirement; OTHER U.S. REGIONS: Youngkin chooses Trump EPA chief for natural resources secretary; NATIONAL: 45Q tax credits evolve to incentivize carbon-capture projects; INTERNATIONAL: EU finally admits natural gas and nuclear are key to decarbonization; European gas prices rise with Russian pipeline stuck in reverse; A Russian invasion of Ukraine would have profound implications for energy markets.