(CNN) -- Love that chocolate Haagen-Dazs ice-cream? But what about the way its makers treat their farmers? How about KitKat and the way its production impacts the environment? In a campaign to push big companies towards more ethical sourcing, international development group Oxfam is asking people to think about food producers' attitudes towards issues such as climate change and workers' rights the next time they dig into their favorite treat. Oxfam's "Behind the Brands" scorecard compares the way the 10 largest global food and drink companies do business. The report, first compiled last year, looks at transparency, women's rights, farmers' rights and land, water and climate sustainability.
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Oxfam's new "Behind the Brands" scorecard ranks the policies of the world's 10 biggest food and drink companies
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The report looks at transparency, women's rights, farmers' rights, and land, water and climate sustainability
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Nestle, Unilever and Coca-Cola finished top, with General Mills and ABF at the bottom
@placeholder, like other low-performing companies, blames Oxfam's methodology for its poor scores.
"At @placeholder, we believe we have policies and practices in place to deliver a genuinely effective corporate responsibility strategy," ABF said in a statement.