Parsing the impact of fresh U.S. sanctions on Russian oil

From the BBC World Service: In an effort to pressure Moscow to negotiate a peace deal in Ukraine, the United States has announced new sanctions on Russian oil. The sanctions effectively blacklist two of Russia's major oil export companies, and that has big implications for both India and China, which rely heavily on Russian oil imports. And then recent talks to make the shipping industry greener have stalled. So what’s the industry doing to cut emissions?