How did Francis Cabot Lowell improve on Samuel Slater's factories

Slater ran small spinning mills, using copies of the English machinery, while Lowell developed new machines for his large factory and did spinning and weaving under power all under one roof.

in contrast, the biological controls are self-sustaining, inexpensive and very effective once established. biological control could be used on thousands of golf course acres, improving their biodiversity and quality as wildlife habitat. in the process, the golf industry will be shown to be leaders in an environmental stewardship program of benefit not only to the lands they manage but also to the watersheds in which they exist.

d. it adversely affected american productivity