ST. PAUL, Minn.--(BUSINESS WIRE)--Ecolab Inc., a global sustainability leader offering water, hygiene and infection prevention solutions and services that protect people and the resources vital to life, today announced it has again earned a place on the annual Dow Jones Sustainability Indices (DJSI). Ecolab ranks on both the Dow Jones Sustainability World Index (DJSI World) and the Dow Jones Sustainability North America Index (DJSI North America) for its continued competitive sustainability performance. Ou ...