Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
what layer is the ozone layer located | 0.8 | 0.7 | 2400 | 18 |
which layer is the ozone layer located | 0.01 | 0.8 | 276 | 53 |
layer where ozone layer is located | 0.52 | 0.9 | 6097 | 45 |
a layer of ozone gas is located in this layer | 0.53 | 0.9 | 6876 | 71 |