| Petrie et al. (2001) | Furnham (2007) | Jeswani & Furnham (2010) | Furnham et al. (2012) | This study |
1. Cell Phones | 2.00 | 1.91 | 2.23 | 1.83 | 2.62 |
2. Radio or cell phone towers | 2.25 | 1.93 | 2.33 | 1.75 | 2.46 |
3. High tension power lines | 2.31 | 1.96 | 2.38 | 1.78 | 2.55 |
4. Nuclear Radiation |
| 2.66 | 3.28 | 2.83 | 3.39 |
5. Air Pollution | 3.40 | 2.98 | 3.49 | 3.11 | 3.61 |
6. Noise Pollution | 2.55 | 2.44 | 2.71 | 2.00 | 2.76 |
7. Depletion of ozone layer | 3.60 | 2.86 | 3.53 | 3.06 | 3.53 |
8. Traffic fumes | 3.55 | 2.98 | 3.60 | 2.99 | 3.31 |
9. Other environmental pollution | 3.40 | 2.85 | 3.53 | 2.93 | 3.45 |
10. Pesticide spray | 2.95 | 2.43 | 3.19 | 2.20 | 3.33 |
11. Poor building ventilation | 2.70 | 2.08 | 2.87 | 2.13 | 2.83 |
12. Genetically modified food | 2.41 | 2.27 | 2.77 | 2.10 | 3.05 |
13. Additives in food | 2.50 | 2.43 | 3.07 | 2.32 | 3.31 |
14. Pesticides in food | 3.20 | 2.08 | 3.44 | 2.65 | 3.54 |
15. Antibiotics in food | 2.80 | 2.27 | 3.25 | 2.50 | 3.36 |
16. Hormones in food | 3.00 | 2.43 | 3.39 | 2.77 | 3.37 |
17. Mad Cow disease (CJD) |
| 2.86 | 2.95 | 2.48 | 2.82 |
18. Contaminated water supply | 3.75 | 3.05 | 3.35 | 3.23 | 3.47 |
19. Fluoridation in water | 2.30 | 3.02 | 2.49 | 2.27 | 2.86 |
20. Vaccination programmes | 2.40 | 2.66 | 2.26 | 2.49 | 2.59 |
21. Overuse antibiotics | 3.20 | 2.57 | 3.21 | 3.00 | 3.23 |
22. Toxic chemicals in household products | 2.91 | 1.66 | 2.95 | 2.57 | 3.12 |
23. Leakage from microwave ovens | 2.60 | 1.77 | 2.19 | 2.20 | 2.49 |
24. Bacteria in air conditioning systems | 2.95 | 2.96 | 2.54 | 2.17 | 2.76 |
25. Drug resistant bacteria | 3.40 | 2.48 | 3.31 | 3.05 | 3.33 |
26. Amalgam dental fillings | 2.25 | 1.72 | 1.91 | 1.65 | 2.37 |
27. Medical and dental x-rays | 2.20 | 1.58 | 2.10 | 1.85 | 2.35 |
28. Bio-terrorism |
| 2.73 | 2.55 | 2.54 | 3.14 |
29. Work Stress |
| 2.35 | 3.19 |
| 3.02 |
30. AIDS and similar epidemics |
| 2.91 | 3.07 |
| 3.03 |
31. Passive smoking |
| 2.47 | 2.82 |
| 2.92 |
32. Terrorist attacks on urban populations |
| 2.87 | 2.83 |
| 3.17 |
33. Plane crash |
| 1.88 | 2.27 |
| 2.80 |
34. DNA testing |
| 1.58 | 1.92 |
| 2.17 |
35. Drugs |
| 2.52 | 2.53 |
| 2.80 |