There is so much evidens, that it is possible to grow rice with ten-fold reduced methane emissions, but getting the message thru seems harder. These are the links I found on the first half of the first page in a search (DuckDuckGo).

The solutions range from very basic farming methods, over using natural bacteria, to genetically modified crops. The obvious would be to go with the methods that are already present and don't use science as an excuse to postpone any changes.