Jan. 21, 2008 -- Eleven multinationals, including Hewlett-Packard, L'Oreal, and PepsiCo, are the latest to join the Supply Chain Leadership Collaboration (SCLC), a corporate initiative to assess greenhouse gas emissions from global supply chains. They join Cadbury Schweppes, Nestle, Procter & Gamble, Tesco, Imperial Tobacco, and Unilever, which signed on last fall.