This is a rather technical/scientific presentation for some people. The upshot of the presentation is that agricultural impacts of fertilizer use on climate are negligible. Prof. van Wijngaarden provides the detailed scientific explanation as to why that is so.
Proposed fertilizer reduction targets, allegedly to address climate change, are unnecessary and will reduce food production at a time when the need for fertilizer and ample crop production is high; many fertilizer and agricultural food producers (i.e., in EU, Ukraine) are compromised. Millions of people face famine right now. Even if implemented, these nitrogen fertilizer reduction policies would do nothing to affect climate change.
From the video description:
The presentation discusses the effects of increasing greenhouse gases on Earth’s climate. It presents the science of how heat is transferred from the Earth’s surface to outer space. Satellite and surface observations of the Earth’s radiated heat spectral signature are in excellent agreement with computed results. One can then determine the surface warming due to doubling greenhouse gases which is known as the climate sensitivity. If the main greenhouse gases, carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) have contributed about 0.1ºC per decade of the warming observed over the past few decades, this would correspond to about 0.064 (0.085)ºK per century of warming each from N2O and CH4 respectively. Proposals to place harsh restrictions on nitrous oxide or methane emissions because of warming fears are not justified by these facts and could seriously jeopardize world food supplies.
William van Wijngaarden is a Full Professor in the Physics Department at York University, located in Toronto, Canada. He received a BSc in Computer Science and a separate Honours BSc in Physics from the University of Windsor in 1982. He then went to Princeton University and obtained an MSc in 1984 followed by a PhD in Physics in 1986. His expertise includes analysing archival data of humidity, temperature and precipitation to detect any climate change. More recently, he began work using radiative transfer to calculate precisely the forcing due to the various greenhouse gases and he is now a pioneer in this field.
Agricultural papers by Albrecht Glatzle, Paraguayan agricultural expert:
Questioning key conclusions of FAO publications ‘Livestock’s Long Shadow’ (2006) appearing again in ‘Tackling Climate Change Through Livestock’ (2013) https://pastoralismjournal.springeropen.com/articles/10.1186/2041-7136-4-1
Domestic Livestock and Its Alleged Role in Climate Change https://www.intechopen.com/chapters/63148
Planet at Risk from Grazing Animals? https://pdfs.semanticscholar.org/a9f2/d8019e48c16ff9800859dd6c3d6c31e82d87.pdf
Severe Methodological Deficiencies Associated with Claims of Domestic Livestock Driving Climate Change
No demonizar el nutriente esencial para la vida: el CO2
To Eat Meat or Not to Eat Meat? Is that the Planetary GHG Question?
Let them Eat Beef – Countering Wendy Mesley and Minister McKenna