 A report in the "Greeley Tribune" says that over the five years it would typically take for a new car owner to pay off the vehicle cost differential, a hybrid Camry driver could save up to in gasoline at June 2007 gasoline prices, with hybrid tax incentives as an additional saving.In countries with incentives to fight against global warming and contamination and promote vehicle fuel efficiency, the pay-back period can be immediate, and all-combustion-engine vehicles can cost more than hybrids because they generate more pollution.Toyota and Honda have already said they've halved the incremental cost of electric hybrids and see cost parity in the future (even without incentives).