Resolver ejercicio, 3 y 4?

Respuesta : serian : Explicación : if we used our car less, the air would be cleaner, took , they would use less waterwere, if sea levels wouldnt risewould walk, if i lived close to the schoolpaid, they would reuse them morewould bedidbuiltwould bewould cycledidn't thinktravelledwouldn't beusedwould improve.