If freshwater is continually being recycled, why are there water shortages?

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before

Determine which of the two measurements in each set is lesser.10°f or 20°ca. 10-fb. 20°c

In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations