0 using biofuel (= fuel made from living things or their waste): --
The experiment with biofuelled buses ended because of the high cost of the fuel.
The vehicle manufacturer is taking the lead in getting biofuelled cars on the road.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Можем да го завършим стъпка по стъпка, колкото и дълъг да е пътят и не може да бъде завършен, колкото и кратък да е пътят, ако дори не маркирате отпечатъка си.