The original article talks specifically about flooding rice farming. https://www.straitstimes.com/world/europe/your-bowl-of-rice-is-hurting-the-climate-too

Apparently, flooding the field kills weeds but allows the rice plant to survive. The plant matter decomposes and releases methane gas. The article's main point is to bring awareness to a planting technique that doesn't produce methane gas. It's clickbait more than corps doing there "take individual responsibility" thing.