While climate change can contribute to forest loss, it is not a direct cause of deforestation. Agriculture, urbanization, and mining are all human activities that directly result in the clearing of forests.

Agriculture is the largest land use in the world, occupying approximately 33% of the world's land surface.

While agriculture can contribute to air pollution through the use of fertilizers and pesticides, it is not a major source of air pollution compared to other human activities such as transportation and industry.

Land conversion is the term used to describe the process of converting natural ecosystems, such as forests or grasslands, into agricultural land.

Forestry is not a type of agricultural land use, as it involves the management of forests for timber and other forest products, rather than the production of food or fiber.

Silvopasture is the practice of using the same land for both agriculture and livestock grazing, often by planting trees or shrubs among the pasture grasses.

Agroforestry can help to reduce water pollution by filtering runoff from agricultural fields, but it does not typically increase water pollution.

Polyculture is the practice of growing different crops together in the same field, often to improve soil fertility and reduce the risk of pests and diseases.

Conventional agriculture, which relies on synthetic fertilizers and pesticides, is not considered to be a type of sustainable agriculture, as it can lead to environmental problems such as water pollution and soil erosion.

Crop rotation is the practice of rotating crops in a field to improve soil fertility and reduce the risk of pests and diseases.

While increased demand for food is a challenge facing society as a whole, it is not a specific challenge facing agriculture in the 21st century.

Ecological restoration is the term used to describe the process of converting agricultural land back to natural ecosystems.

Ecological restoration can help to reduce greenhouse gas emissions by restoring forests and other ecosystems that absorb carbon dioxide from the atmosphere.

Conservation agriculture is the practice of managing agricultural land to protect and enhance natural ecosystems.

Using synthetic fertilizers is not a principle of conservation agriculture, as it can lead to water pollution and other environmental problems.