4 questions

1) I will be researching which car manufacture has produced the most fuel -efficient car. 2)Volkswagen's, 1L car is the world's most fuel-efficient car, having a mpg rating of 280. 3) If nobody were to manufacture fuel-efficient cars, more greenhouse gasses would be emitted into the ozone layer, helping depleat it. 4) If all car manufactures produced more fuel efficient cars and people bought them, less greenhouse gasses would be emitted, also our need for oil would decreas.