how is agriculture affected by global warming

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Overview

Other indirect impacts from changed conditions

It is difficult to project the impact of climate change on utilization (protecting food against spoilage, being healthy enough to absorb nutrients, etc.) and on volatility of food prices. Most models projecting the future do indicate that prices will become more volatile. In 2019 the IPCC stated that millions already suffer from food insecuritydue to climate change. As of 2019, an estimated 831 million people are undernourished. Climate change impacts depend strongly on p…

Direct impacts from changing weather patterns

As the temperature and weather patterns change, areas suitable for farming will alter. The current prediction is for temperature increase and precipitation decrease for major arid and semi-arid regions (Middle East, Africa, Australia, Southwest United States, and Southern Europe). In addition, crop yields in tropical regionswill be negatively affected by the projected moderate increase in temperature (1-2 °C) expected to occur during the first half of the century. During the second hal…

Direct impacts from increased atmospheric CO2 levels

Elevated atmospheric carbon dioxide affects plants in a variety of ways. Elevated CO2 increases crop yields and growth through an increase in photosynthetic rate, and it also decreases water loss as a result of stomatal closing.
Changes in atmospheric carbon dioxide may reduce the nutritionalquality of some crops, with for instance wheat having less protein and less of some minerals. Food crops could see a reductio…

Climate driven changes in pests, plant diseases and weeds (indirect impacts)

Global warming will alter pest, plant disease and weed distributions, with potential to reduce crop yields, including of staple crops like wheat, soybeans, and corn.
Currently, pathogens take 10-16% of the global harvest and this level is likely to rise as plants are at an ever-increasing risk of exposure to pests and pathogens. Warmer temperatures can increase the metabolic rateand number of breeding …

Global warming will alter pest, plant disease and weed distributions, with potential to reduce crop yields, including of staple crops like wheat, soybeans, and corn.
Currently, pathogens take 10-16% of the global harvest and this level is likely to rise as plants are at an ever-increasing risk of exposure to pests and pathogens. Warmer temperatures can increase the metabolic rateand number of breeding …

Global aggregate estimates for crop yields

Climate change induced by increasing greenhouse gases is likely to affect crops differently from region to region. The Intergovernmental Panel on Climate Change (IPCC) has produced several reports that have assessed the scientific literature on climate change. In 2019 the IPCC stated that millions already suffer from food insecuritydue to climate change and predicted decline in global cro…

Impacts on forests and forestry

The IPCC Sixth Assessment Report report in 2022 found that: “In the past years, tree mortality continued to increase in many parts of the world. Large pulses of tree mortality were consistently linked to warmer and drier than average conditions for forests throughout the temperate and boreal biomes. Long-term monitoring of tropical forests indicates that climate change as begun to increase tree mortality and alter regeneration. Climate related diebackhas also been observed du…

Adaptation

Adaptation in agriculture is often not policy driven, but farmers make their own decisions in response to the situation they face. Changes in management practices might be the most important adaptation option.Changes in locations of agriculture and international trade in food commodities might also contribute to adaptation efforts.
Agricultural innovation is essential to addressing the potential issues of climate change. This in…

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