1) The wasterfulness of leaving the lights on all night was evident in the high electricity bill.

2) The student's wasterfulness with time management led to poor grades.

3) Her wasterfulness with money resulted in constant overdraft fees.

4) He realized the wasterfulness of purchasing items he never used.

5) The company recognized the wasterfulness of excessive packaging and implemented changes to reduce waste.

6) Despite warnings, the team continued to show wasterfulness in their resource allocation.

7) The environmental group was dedicated to raising awareness about the wasterfulness of single-use plastics.

8) The speaker highlighted the wasterfulness of throwing away perfectly good food.

9) The community garden aimed to combat wasterfulness by promoting composting and recycling.

10) The documentary shed light on the wasterfulness of the fast fashion industry.