Wärtsilä recently signed an agreement with Metso Corporation to co-operate in developing and delivering scrubber systems for marine applications. Under the terms of this agreement, Metso is to supply the scrubber unit, while Wärtsilä is responsible for world-wide sales and integration, including automation, water treatment, and ancillaries. Both Wärtsilä and Metso have experience in the use of scrubber technology for land-based installations. Wärtsilä and Metso have already worked together for a number of years in the development of scrubber technology. In 2005 the two companies, together with other companies within the Finnish maritime cluster, embarked on a program to develop a feasible marine scrubber. By autumn 2007, the project was ready for a test installation.