1.  We went by bus - the cheapest means of travel.

2.  Dumping wastes in hollows and streams is certainly the cheapest means of disposing of waste.

3.  Plantation companies, as well as slash-and-burn farmers, set wooded areas alight as the cheapest means of clearing land for planting.

4.  Ferries are the cheapest means of transportation between the two lakeside towns in a country whose infrastructure has been destroyed by a succession of armed rebellions.

5.  First, the rivers were systematically turned into public sewers for all kinds of domestic and industrial waste, as this was the cheapest means of waste disposal.

6.  Ferries are the cheapest means of transportation between the two lakeside towns in a country where armed rebellions and neglect have destroyed the infrastructure.

7.  The Taliban have doubled the cost of consumer electricty in Kabul, but locals said it was still the cheapest means of providing household heating and cooking.