A survey into green fleet attitudes by leasing company Alphabet found that hybrid vehicles were most popular with small business fleets.
Small businesses were most likely to have reduced the number of drivers eligible for business cars, too.
Next year Honda has promised to meet this demand with some stylish newcomers.
There will be a new hatchback hybrid model: an exciting sports coupe hybrid like this CR-Z concept design shown at the London Motor Show: and in 2010 a hybrid version of the all-new Honda Jazz.
However, the same Alphabet survey found that small business fleets were also less likely to limit the CO2 output of their company cars.
And the Honda Accord is the most reliable car.
The Honda Civic was the fourth most reliable car - making Honda the only manufacturer to have two cars in the top ten.
This is the third successive year Honda has placed top of both the manufacturer and car FN50 reliability surveys.
The FN50 Car Reliability Survey is conducted by leading industry magazine Fleet News.
The manufacturer survey covers 906,000 vehicles and the car model survey 708,000 vehicles. The cars are run by the UK