Formerly, industrial goods ____(41)____ to laspt forever. A car or a cooker was used ____(42)____ a very long time. Nowadays, however, industry has persuaded us that its ____(43 )____ can only last a very short time. Its ____ (44)____ to throw them away than ____ (45)____ them. This has led directly to the "throw-away society", and to the waste of the earth's resources. Just think ____(46)____ the cars that are traded in daily simply because they are out-of-fashion". Just think of the expensive packaging material that is ____(47)____ away each time a new object is ____ (48____. Why aren't they ____ (49)____ to prevent extreme ____(50)____ of resources?