In the Alps and Rocky Mountains, water is scarce in winter, and possibilities for treating wastewater and sewage are often the factor most limiting the development of ski areas.
(water; is; scarce in winter; L:In the Alps and Rocky Mountains) (possibilities for treating wastewater and sewage; are; T:often; the factor most limiting the development of ski areas) (the factor; most limiting; the development of ski areas)
water possibilities for treating wastewater and sewage the factor
is are most limiting
scarce in winter L:In the Alps and Rocky Mountains
T:often the factor most limiting the development of ski areas
the development of ski areas