| harmful effect | 10.66 | The Navy disputes reports of harmful effects. | ||
| harmful bacterium | 4.61 | Can harmful bacteria grow in this mess? | ||
| harmful substance | 2.44 | Some tears lubricate the eye, removing harmful substances. | ||
| harmful chemical | 2.17 | Chromium is one of many harmful chemicals of concern at Hanford. | ||
| harmful ray | 1.97 | These are the harmful rays which cause skin cancer. | ||
| harmful emission | 1.78 | The law is designed to limit harmful emissions. | ||
| harmful radiation | 1.78 | Sun creams work by blocking harmful ultraviolet radiation. | ||
| harmful material | 1.12 | Viruses can be annoying or deadly if they carry harmful genetic material. | ||
| harmful level | 0.92 | Swordfish and tuna may have harmful levels of mercury. | ||
| harmful consequence | 0.86 | Critics worry about harmful long-range consequences of genetically altered crops and food. | ||
| harmful gas | 0.66 | The changing world climate is probably due to a build-up of harmful gases such as carbon dioxide. | ||
| harmful impact | 0.53 | No, this technology may have a harmful impact on my behavior. | ||
| harmful microbe | 0.53 | This gives harmful microbes the chance to mutate to survive. | ||
| harmful activity | 0.46 | BP Amoco denied it engaged in any environmentally harmful activity. | ||
| harmful drug | 0.46 | They also monitor drugs dispensed to consumers, to prevent harmful drug interactions. | ||
| harmful one | 0.46 | One can put a harmless interpretation on this or a more harmful one. | ||
| harmful pesticide | 0.46 | Pamela Stephenson is upsetting the apple cart with her war against harmful pesticides in our food. | ||
| harmful pollutant | 0.46 | Outside the human body, biosensors can be useful for monitoring harmful pollutants in the environment. | ||
| harmful form | 0.39 | Tampering with the seam is much the most harmful form of ball vandalism. | ||
| harmful organism | 0.39 | No harmful organisms were detected in either study. |