How critical different strategies are to combating climate change has a significant weaker consensus. Energy productions and energy usage is usually the most critical in mitigating climate change. Diet is fairly debated subject, with some researchers listing it higher on the list while others listing it much lower.
Agriculture is often combined with land use, but the deeper one go into this subject the more difficult things get. A "wet" forest is several times better than a dry forest, so in terms of combating climate change, removing water draining can be more effective than increasing the amount of land dedicated to forestation. There are many factors for policy makers and a lot of low hanging fruit that is more critical to target first.