| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| what animals did ddt effect | 1.88 | 0.2 | 566 | 67 |
| effects of ddt on animals | 0.5 | 0.7 | 9121 | 11 |
| ddt effect on animals | 0.89 | 0.5 | 7955 | 38 |
| what does ddt do to animals | 1.07 | 0.7 | 4394 | 39 |
| what effect did ddt have on birds | 0.93 | 0.8 | 840 | 41 |
| what does ddt cause in animal populations | 0.73 | 1 | 1925 | 32 |
| what did ddt do to birds | 0.26 | 0.2 | 358 | 7 |
| in animal populations ddt causes | 0.06 | 0.3 | 3562 | 2 |
| how did ddt affect birds | 1 | 0.3 | 3234 | 29 |
| how did ddt affect humans | 1.61 | 0.4 | 6825 | 47 |
| what did ddt do to the environment | 1.23 | 0.9 | 4303 | 57 |
| what problems did ddt cause | 0.3 | 0.9 | 9365 | 31 |
| how did ddt affect the environment | 0.52 | 0.8 | 2379 | 12 |
| effects of ddt on organisms | 1.28 | 0.9 | 6642 | 28 |
| ddt effect on birds | 0.38 | 0.5 | 7556 | 85 |
| how did ddt affect natural systems | 1.81 | 0.3 | 6960 | 75 |
| ddt effect on humans | 1.72 | 0.2 | 7485 | 85 |
| why was ddt harmful | 1.68 | 0.5 | 7605 | 41 |
| ddt effects on history | 1.53 | 0.3 | 8078 | 19 |
| impacts of ddt on humans | 1.01 | 0.9 | 5849 | 75 |
