Question

Impact of climate change on agriculture ipcc and fao

Answer 1

Climate change and agriculture are interrelated processes, both of which take place on a global scale. Climate change affects agriculture in a number of ways, including through changes in average temperatures, rainfall, and climate extremes (e.g., heat waves); changes in pests and diseases; changes in atmospheric carbon dioxide and ground-level ozone concentrations; changes in the nutritional quality of some foods;[1] and changes in sea level.[2]

Climate change is already affecting agriculture, with effects unevenly distributed across the world.[3] Future climate change will likely negatively affect crop production in low latitude countries, while effects in northern latitudes may be positive or negative.[3] Climate change will probably increase the risk of food insecurity for some vulnerable groups, such as the poor.[4] Animal agriculture is also responsible for CO2 greenhouse gas production and a percentage of the world's methane, and future land infertility, and the displacement of local species.

As part of the IPCC's Fourth Assessment Report, Schneider et al. (2007) projected the potential future effects of climate change on agriculture.[41] With low to medium confidence, they concluded that for about a 1 to 3 °C global mean temperature increase (by 2100, relative to the 1990–2000 average level) there would be productivity decreases for some cereals in low latitudes, and productivity increases in high latitudes. In the IPCC Fourth Assessment Report, "low confidence" means that a particular finding has about a 2 out of 10 chance of being correct, based on expert judgement. "Medium confidence" has about a 5 out of 10 chance of being correct.[42] Over the same time period, with medium confidence, global production potential was projected to:[41]

increase up to around 3 °C,

very likely decrease above about 3 °C.