PepsiCo and Cargill are among 13 US companies to issue pledges on climate change as part of a wider commitment drawn up by the US government.
The Pepsi cola and Lay's crisps owner has announced a series of undertakings in areas including greenhouse sustainable farming and greenhouse gas emissions.
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Pledges from agribusiness giant Cargill included further work on emissions, water use and energy.
The commitments are part of what the Obama administration calls the American Business Act on Climate Pledge.
The US government said the signatories to the pledge, which also include Warren Buffett's Berkshire Hathaway, Goldman Sachs and Google, were "voicing support for a strong outcome" at the upcoming global climate talks in Paris in December.
PepsiCo said it would expand the use of sustainable farming practices to 500,000 acres of farmland used by our North American agricultural suppliers in its supply chains for corn, oats, potato, and citrus by the end of next year.
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By GlobalDataThe company said it continue to cut the greenhouse gas emissions from its global fleet through the use of electric, hybrid, compressed natural gas and other alternative fuel vehicles, as well as other fuel efficiency programmes.
From a 2015 baseline, Cargill pledged to improve "greenhouse gas intensity", its freshwater efficiency and its energy efficiency, each by 5%, by 2020.
It also said it would increase renewable energy to 18% of its total energy use, up from 14%.
