11.   They reported that clouds are an important and heretofore uninvestigated contributor to the climate.

12.   There are some clouds in the sky,but the sun is shining.

13.   I looked up at the sky and saw that the clouds were one dark, lurid, compact mass.

14.   The droplets thus formed -- of dilute sulphuric acid -- are smaller than normal water vapour droplets and therefore clouds containing them are brighter than normal.

15.   Speculation that global climate change could result was largely discounted, since the smoke cloud was too low to have an impact on stratospheric climate circulation.

16.   Clouds are not capable of entering into cumulative selection.

17.   The clouds were now only faint wisps lit by the strong mid-day sun.

18.   And always, there are ecstatic clouds.

19.   At least on this day, the dark clouds overhead were only in the sky.

20.   Billowing, pillowing, jutting, scudding across the endless overhead stage these continuously distinctive clouds are magnificent showoffs.