McDonald's has laid out a plan to move to more sustainable meat, coffee and product packaging.

Gradually, the company will require suppliers to source food and materials from sustainably-managed land, though there are no specific timelines for now.

With analysis help from the World Wildlife Fund, the company is initially focusing on beef, poultry, coffee, palm oil and packaging.

Beef, especially, has some of the biggest impacts among McDonald's foods.

(READ more in Green Biz)