Assess the valence intensity of the snippet "''The concern,'' she wrote then, ''is with a synthesis which shows the skyscraper in relation to the less colossal edifices which preceded it; city vistas, waterways, highways and means of transportation; areas where peculiarly urban aspects of human living can be observed; city squares where the trees die for lack of sun and air; narrow and dark canyons where visibility fails because there is no light ... the onward march of the steam shovel...''" based on the mood of the author. Offer a numerical rating between 0 and 1, with 1 representing highly positive and 0 representing highly negative.