"When it comes to TV, where Twitter is particularly strong is grabbing the conversation, or facilitating the conversation, " said Curt Hecht, chief global revenue officer for the Weather Co.

WSJ: ESPN, Twitter Expand Video Tie-Up

Lemore Hecht, a spokeswoman for Hertz, said the company started offering electric cars in 2010 for its cars-by-the-hour rental business, available in New York, Paris, Berlin, London, Washington DC, California and some US university sites.

BBC: Rental cars go electric