Respondents | Plant Materials | Structural Materials | Natural Elements | Man-made | Natural and Man made | Total |
Students | 68 | 33 | 11 | 40 | 88 | 240 |
Staff | 41 | 12 | 11 | 31 | 65 | 160 |
Staff PHU | 1 | - | - | - | 1 | 2 |
Total | 110 | 45 | 22 | 71 | 154 | 402 |
% | 27.4% | 11.1% | 5.5% | 17.7% | 38.3% | 100% |