These gases are known as greenhouse gases because they trap heat in the atmosphere, thereby contributing to global warming or climate change. Atmospheric change can affect agriculture. Certain atmospheric pollutants linked to incomplete combustion of fossil fuels are known to cause damage to agricultural crops. Ground level ozone derived from oxidant smog is particularly harmful, for example, to white beans, potatoes and maple trees. In the long run, atmospheric change contributes to climatic variations which could ultimately affect cropping patterns.
Agriculture contributes to atmospheric change in various ways.
Agricultural machinery and grain drying and heating systems consume fossil fuels and release greenhouse gases and other pollutants. Fertilizers and pesticides, if improperly applied, can contribute chemical compounds to the atmosphere. Animal manures release methane gas. While agriculture can contribute to atmospheric problems, it can also be part of the solution by helping to offset greenhouse gas emissions. Air quality concerns, such as dust, odour and noise, require careful management in many parts of the sector.