Agriculture is one of the world's top polluting industries, accounting for up to one-fifth of global greenhouse gas emissions. 

Ahead of COP26, many major food groups have committed to slashing their carbon emissions and reaching net zero in the coming decades. 

Nestlé, the world's largest food and beverage company, says it is going to the source, working with several of the 500,000 farmers in its supply chain to develop more sustainable agricultural practices. 

The goal is to bring the food giant's agricultural greenhouse gas emissions to zero by 2050 and make "regenerative" farming the norm. 

Watch the video above for an inside look at one of the farms already undergoing transformation. 

—Correction: This article has been updated to accurately state the number of farmers in the Nestlé supply chain.