Acquisition of goods and services may account for over 50% of the company's expenses, and may exceed 80% in sectors such as in retailing, electronic and automotive industries - with all this purchasing power, the private sector has a great ability to influence markets. Influencing procurement practice within a private-sector firm is not straightforward for governments, meaning that the companies themselves often have to be self-motivated to embrace sustainability. It becomes a social responsibility for both businesses and workers to promote sustainable procurement in the workplace.