How environmentally friendly are you? Test your knowledge with our green quiz.

There’s a total of 25 questions - and if you get stuck, why not take a look at our other green features for help? Good luck!

Green driving

1) What driving technique helps lower fuel consumption?
a. Braking harshly
b. Accelerating fast
c. Braking slowly and well in advance

2) To maintain a good fuel economy, at which point should you change gears?
a. As soon as possible
b. Between 2,000 and 3,000rpm
c. As late as possible

3) Complete the sentence, “The faster you drive,”
a. the more emissions your car emits
b. the CO2 emissions from your car remain the same
c. the less emissions your car emits

4) Can a diesel engine run on cooking oil?
a. Yes – all diesel engines can
b. No
c. Yes, but only certain diesel engines, usually older ones

5) Which type of green vehicle is least common on UK roads?
a. Hydrogen
b. Solar power
c. Electric

Energy saving

6) What can you do to save energy when leaving your vehicle parked?
a. Park it as quickly as possible to save fuel
b. Make sure all lights are switched off
c. Close all doors

7) When your car battery dies, how should you dispose of it?
a. Take it to a dump
b. Leave it in your garage
c. Throw it away into a bin

8) How does a spoiler fitted to a car affect its fuel consumption?
a. It makes no difference to fuel economy
b. It increases fuel consumption by 20 per cent
c. It decreases fuel consumption by 20 per cent

9) Which car feature saves most fuel when switched off?
a. Air conditioning
b. Heated windscreen
c. Sunroof

10) How can you make an MPV more environmentally-friendly?
a. Paint it green
b. Ask the passengers to get out and walk
c. Remove the back seats if they’re not being used

Green cars

11) What car was the first biofuel motor to win a British motoring race?
a. Koenigsegg CCXR
b. Saab 9-5 Biopower
c. Aston Martin DBRS9 GT3

12) What vehicle is the number one for low CO2 emissions in the UK?
a. Toyota Prius
b. Volkswagen Polo BlueMotion
c. Volkswagen Polo BlueMotion 2

13) Which vehicle broke the hydrogen car speed record in August 2007?
a. BMW Hydrogen 7
b. Ford Fusion 999
c. Honda FCX Clarity

14) Can electric cars be charged in an ordinary mains socket?
a. Yes
b. No
c. No but they’ll be able to from March 2008

15) Do hybrid vehicles have to be recharged through a plug socket?
a. Yes
b. No
c. No but they can for easier recharging

Green fuels

16) Which green fuel has a higher octane rating than petrol?
a. Bioethanol
b. Electricity
c. Solar

17) Which vehicles combine a rechargeable electric system with a fuel-based engine?
a. Hydrogen
b. Electric
c. Hybrids

18) What’s the most popular type of bioethanol?
a. E95
b. E85
c. E100

19) Why aren’t Hydrogen vehicles common?
a. Fuel cells are fragile and hard to store
b. Hydrogen hasn’t been developed enough to run vehicles efficiently
c. Fuel cells break down easily

20) Which type of vehicles are all exempt from the London congestion charge?
a. Electric
b. Bioethanol
c. Biodiesel

Green facts

21) Which electric sports car can travel around 250 miles before it needs recharging?
a. Venturi Fetish
b. Tesla Roadster
c. Lightning GTS

22) Which bioethanol-fuelled car has 1,018bhp?
a. Koenigsegg CCXR
b. Saab 9-5 Biopower
c. Aston Martin DBRS9 GT3

23) Which small petrol-fuelled vehicle emits 113g/km of CO2?
a. Smart Fortwo
b. Goingreen G-Wiz
c. Mitsubishi i

24) How can you “buy back” clean air to cover for your car’s CO2 emissions?
a. Pay a carbon offsetting company to plant more trees
b. Pay the Government a clean fee of £100
c. Apply to change to a higher tax band

25) Which types of vehicles are always exempt from car tax?
a. Biofuels
b. Electric and hydrogen
c. Electric and petrol-hybrids

Finished? Read our green quiz answers page to check your results.