Al Gore is asking us to go for 100% clean electricity within a decade.  That would mean using no coal.  Currently, 50% of US electricity comes from coal.  So, were we to eliminate coal from the energy equation, we'd have a bit of work to do as a nation (not counting fighting those who would benefit from staying with coal). 

A. Siegel, commenter at Firedoglake and a founder of "Energize America", has a plan to get us to a coal-free electrical system by 2030 - and improve the economy at the same time.  In fact, he takes us over the goal line with room to spare, using what he calls the portfolio approach.  Here's the outline of the plan with the strategy and the amount of current electricity usage it would address:

Energy efficiency - 20% reduction (see previous post on California's experience to see how realistic this is)

Shifting transportation - 15% reduction (includes plug-in vehicles, electric vehicles, electrification of rail)

Combined Heat Power - 20% reduction (would require regulatory change to allow combinations of heat generation and the making of electricity)

Renewables - 35% of current usage (wind, solar, biofuels, geothermal)

Nuclear - 15% of current usage (which of course brings its own difficulties)

Given how much coal usage contributes to our greenhouse gas emissions, this plan would be a great blueprint for going forward.