By Elsa English Warnings about the hazards of reliance on fossil fuels fill the news. Climate change, air pollution, and soaring gasoline prices are all part of the equation, and while alternative sources of energy are gaining ground, petroleum is still king. Fossil fuel products are the underpinning of the world economy, and will probably remain so until they become unprofitable. Crude oil transportation is an essential component of production. Much of the toxic liquid is moved through pipelines. Even when fresh from the ground, this is not...