Edited sentence: Among these are labor unions, community  groups, grassroots organizations, religious organizations, environmental groups and Wal-Mart customers.Other areas of criticism include the corporation's foreign product sourcing, treatment of product suppliers, employee compensation and working conditions, environmental practices, the use of public subsidies, and the company's security policies.They have protested against Wal-Mart, the company's policies and business practices, including charges of racial and gender discrimination.Wal-Mart denies doing anything wrong and maintains that low prices are the result of efficiency.Wal-Mart has been subject to criticism by numerous groups and individuals