National Public Radio has a series of reports on how the auto industry will get to the recently annouced goal of 55 mpg by 2025.
As part of the report on sales of hybrid and electric cars, the NPR team took electric car sales data and compared that information to sales of all cars in markets across the country. They then turned that info into an interactive map.
Map: Hybrid And Electric Sales Across The Country
More news organizations are using mash-ups and interactive maps/charts to help tell stories.
BTW: In the DC area, hybrids and electric cars account for 4.2 percent of all car sales.