Short answers, pulled from the story.
Sustainable agriculture is farming that reduces environmental harm, replenishes natural resources, and ensures that non-renewable resources are used productively. The USDA formally defined the term in 1977; the phrase itself is credited to the Australian agronomist Gordon McClymont and became widely used in the late 1980s.
Food systems are responsible for one third of all anthropogenic greenhouse gas emissions, making agriculture one of the largest contributors to climate change. Sustainable agriculture is considered one of the most effective tools for reducing this footprint while continuing to feed a growing population.
Land sparing strictly separates intensively farmed land from protected natural habitat to preserve biodiversity. Land sharing, also called wildlife-friendly agriculture, integrates biodiversity into farmed landscapes through practices like agroforestry. A literature review found land sparing favored for tropical forest biodiversity in 67 percent of studies, while land sharing was considered better for farmer livelihoods in developing countries in 58 percent of studies.
In the early 1900s, Dr. George Washington Carver worked to address rural poverty by teaching sustainable farming practices directly on farmers' land in rural America. He invented the Jesup Wagon, a mobile agricultural school, and promoted crop rotation, composting, and soil health as alternatives to monoculture cotton farming. The USDA's Agricultural Research Service headquarters was later named after him.
Agricultural practices consume an estimated 69 percent of the world's fresh water. In regions like the Ogallala Aquifer in the United States, groundwater is being drawn down faster than it can be naturally replenished, making water efficiency a central challenge for sustainable farming.
The European Union's Farm to Fork program, published in May 2020, sets targets to make 25 percent of EU agriculture organic, reduce pesticide use by 50 percent, cut fertilizer use by 20 percent, reduce nutrient loss by at least 50 percent, and halve food waste, all by 2030. The program also dedicates 10 billion euros to research and innovation.