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Natural Gas
Pros:

* Widely used, contributes 21% of the world’s energy production today * Delivery infrastructure already exists * End use appliances already widespread * Used extensively for power generation as well as heat * Cleanest of all the fossil fuels * Burns quite efficiently * Emits 45% less CO2 than coal * Emits 30% less CO2 than oil * Abundant supply in the US. DOE estimates 1.8 trillion barrels * Low levels of criteria pollutants, (e.g. SOx, NOx) or soot when burned * Can be used as an automotive fuel * Burns cleaner than gasoline or diesel * No waste (e.g. ash ) or residue to deal with * Lighter than air, safer than propane which is heavier than air * Can be used to makes plastics, chemicals, fertilizers and hydrogen * Natural gas industry employs 1.2 million people

Cons: * Emits carbon dioxide when burned * Non-renewable fuel, supply cannot be replaced for millennia * Contains 80-95% methane, a potent greenhouse gas (GHG) * Explosive, potentially dangerous * Concentrated sources require long distance transmission and transportation * Energy penalties at every stage of production and distribution * Requires extensive pipelines to transport over land * Stored and distributed under high pressure * Requires turbine-generators to produce electricity * Liquefied form (LNG) used to transport over water, in tanker ships is potentially very dangerous * Energy use competes with use for chemicals and fertilizers * Additionally, there are significant environmental risks associated with “fracking” * Water pollution due to runoff of fracking chemicals * Companies are not required to disclose the composition of fracking chemicals (another example of lobbying in action). * Water can also bring up adsorbed underground toxins

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