How to Use "vapour" with Example Sentences

1. It is effective , but mercury vapour is extremely toxic .

2. Their method exploits the fact that water vapour changes the speed at which radar waves travel though air .

3. The user inhales the vapour .

4. But one problem was that what appeared to be real demand may have been partly vapour .

5. On the other , water vapour is transparent , whereas clouds reflect light .