Caterpillar Inc. has been in operations for more than 85 years and has been making sustainable progress possible and driving positive change on every continent. The company is a global leader in size, scope, reach and character by providing manufacture of construction and mining equipment, diesel and natural gas engines, industrial gas turbines and diesel-electric locomotives. In 2011, sales and revenue reached 60.138 billion and also is a leading provider through Caterpillar Financial Services, Caterpillar Remanufacturing Services and Progress Rail Services. The company has more than 132,000 employees worldwide and the number continues to grow along with the company. The company is aware of conserving energy and tries to find alternatives of energy by exploring, developing, and extracting traditional and alternative energy.