Nego, evo sižea avgustovskog izveštaja koje su UN usvojile na međuvladinom panelu o klimatskim promenama u Avgustu:
https://www.ipcc.ch/site/assets/uploads/2019/08/Edited-SPM_Approved_Microsite_FINAL.pdfTu se da pročitati to koliko zemljoradnja i korišćenje zemljišta u druge svrhe učestvuju u emisijama gasova staklene bašte (
kompletan izveštaj je ovde, ko ima mnogo vremena), a evo pasusa sa ciframa:
Agriculture, Forestry and Other Land Use (AFOLU) activities accounted for around 13% of CO2, 44% of methane (CH4), and 82% of nitrous oxide (N2O) emissions from human activities globally during 2007-2016, representing 23% (12.0 +/- 3.0 GtCO2e yr-1) of total net anthropogenic emissions of GHGs21 (medium confidence). The natural response of land to human-induced environmental change caused a net sink of around 11.2 GtCO2 yr-1during 2007-2016 (equivalent to 29% of total CO2 emissions) (medium confidence); the persistence of the sink is uncertain due to climate change (high confidence). If emissions associated with pre- and post-production activities in the global food system22 are included, the emissions are estimated to be 21-37% of total net anthropogenic GHG emissions (medium confidence). {2.3, Table 2.2, 5.4}.
Other approaches, such as global food system, include agricultural emissions and land use change (i.e., deforestation and peatland degradation), as well as outside farm gate emissions from energy, transport and industry sectors for food production. Emissions within farm gate and from agricultural land expansion contributing to the global food system represent 16-27% of total anthropogenic emissions (medium confidence). Emissions outside the farm gate represent 5-10% of total anthropogenic emissions (medium confidence). Given the diversity of food systems, there are large regional differences in the contributions from different components of the food system (very high confidence). Emissions from agricultural production are projected to increase (high confidence), driven by population and income growth and changes in consumption patterns (medium confidence). {5.5, Table 5.4}
Metan je tu, naravno, ono čega se treba posebno plašiti z
ahvaljujući tome da je mnogo "jači" odnosno da ima mnogo veći kapacitet da toplotu zadržava unutar atmosfere i vraća na zemlju od ugljendioksida. Plus,
ovaj rad objašnjava zašto što je atmsfera toplija, emisije metana više rastu (taj deo svakako nema veze s kravama, da ne ispadnu one krive za sve).
Elem, naravno da su fosilna goriva i dalje vodeći emitor gasova staklene bašte, ali kao što se vidi, proizvodnja hrane čini zaista pristojan deo jednačine. Izveštaj ide u dosta detalja u predloženim rešenjima, pominjući ovo što je Skalop podsetio - da se trećina proizvedene hrane baci, te da tu treba optimizovati proces da se gubici smanje, a pominje i globalnu promenu režima ishrane:
Balanced diets, featuring plant-based foods, such as those based on coarse grains, legumes, fruits and vegetables, nuts and seeds, and animal-sourced food produced in resilient, sustainable and low-GHG emission systems, present major opportunities for adaptation and mitigation while generating significant co-benefits in terms of human health (high confidence). By 2050, dietary changes could free several Mkm2 (medium confidence) of land and provide a technical mitigation potential of 0.7 to 8.0 GtCO2e yr-1, relative to business as usual projections (high confidence). Transitions towards low-GHG emission diets may be influenced by local production practices, technical and financial barriers and associated livelihoods and cultural habits (high confidence). {5.3, 5.5.2, 5.5, 5.6
Naravno, sve je to za sada u domenu matematike, niko još ne planira da pobjie sve krave bombardovanjem iz orbite. Al sve ovo pominjem jer je i Međunarodna federacija društava Crvenog krsta i Crvenog polumeseca pokrenula "Global meat-free challenge" koji treba da kulminira sa Svetskim danom hrane, za dve nedelje, pa eto, ko hoće, može da gleda kako crveni krstovi i polumeseci širom sveta nude veganske i vegetarijanske recepte u svrhu usporavanja i adaptacije na klimatske promene
Edit: imaju i simpatičan poster:
