Now the powerhouse of rental cars had jumped into the market of car rentals by the hour.  The Hertz Corp., which bills itself as "the world's largest general use car rental brand," is launching a service, "Connect by Hertz." Customers who pay an annual fee will be able to rent cars by the hour, minus ...

  Would sharing a car - and renting one by the hour - keep more cars off the road and help our environment? Perhaps. At least, for those on low budgets who can't afford to buy a car, especially in this economic meltdown, this could be a practical option. Zipcar, the car sharing service in Cambridge, Mass., which rents cars by the hour ...