preceding overview and results of operations section, the combination of restructuring actions and other special items significantly impacted 2009 results. There were no special items that impacted operating income in 2011 or 2010. The following table summarizes special items by business segment.

  

The following discusses total year results for 2011 compared to 2010, and also discusses 2010 compared to 2009, for each business segment.

 

Industrial and Transportation Business (34.0% of consolidated sales):

  

The Industrial and Transportation segment serves a broad range of markets, such as automotive original equipment manufacturer (OEM) and automotive aftermarket (auto body shops and retail), renewable energy, electronics, paper and packaging, food and beverage, and appliance. Industrial and Transportation products include tapes, a wide variety of coated and non-woven abrasives, adhesives, specialty materials, filtration products, energy control products, closure systems for personal hygiene products, acoustic systems products, and components and products that are used in the manufacture, repair and maintenance of automotive, marine, aircraft and specialty vehicles.

 

Year 2011 results:

 

Sales in Industrial and Transportation increased 19.5 percent to $10.1 billion. In local-currency terms, sales increased 15.9 percent, with 10.0 percent of this increase attributable to organic local-currency growth. Acquisitions increased sales by 5.9 percent, primarily driven by Winterthur and Alpha Beta (discussed below). Foreign currency impacts added 3.6 percent to 2011 sales growth. Geographically, local-currency sales increased in all major regions, led by Asia Pacific and Europe. Local-currency sales growth was broad-based across the portfolio, led by abrasives systems, renewable energy, aerospace and aircraft maintenance, industrial adhesives and tapes, and energy and advanced materials. In addition, despite the Japan and Thailand natural disasters, 3M also achieved growth in its automotive aftermarket and automotive OEM businesses.

 

3M continues to invest in its Industrial and Transportation business. In March 2011, 3M acquired a controlling interest in Winterthur via completion of a public tender offer. Winterthur, based in Zug, Switzerland, is a leading global supplier of precision grinding technology serving customers in the area of hard-to-grind precision applications in industrial, automotive, aircraft, and cutting tools. In addition, in February 2011, 3M completed its acquisition of the tape-related assets of Alpha Beta, a leading manufacturer of box sealing tape and masking tape headquartered in Taipei, Taiwan.

 

Operating income was $2.1 billion in 2011, 17.3 percent higher than 2010. 3M achieved operating income margins of 20.4 percent, even with continued investments to support growth.

 

Year 2010 results:

 

Sales in Industrial and Transportation increased 18.4 percent to $8.4 billion. In local-currency terms, sales increased 17.2 percent, driven almost entirely by organic volume. Foreign currency impacts added 1.2 percent to 2010 sales growth. Geographically, local-currency sales growth increased in all major