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    • Holy Cow History: A Short-Lived Presidential Playground

      The World· 1 day ago

      Whenever a president wants to let down his hair these days, a brief chopper ride to Camp David in the Maryland mountains gives him all the solitude he needs. Every chief executive since Franklin ...

    • Future Fuels: Momentum Builds for Ammonia

      MarineLink· 7 days ago

      The interest in ammonia stems both from its zero emissions when used as fuel and because its production isn’t dependent on biogenic carbon sources. To realize large-scale production of green ...