{"id":31919,"date":"2019-03-21T12:49:48","date_gmt":"2019-03-21T16:49:48","guid":{"rendered":"https:\/\/bonnefield3854.wpengine.com\/?p=31919"},"modified":"2026-07-07T11:34:44","modified_gmt":"2026-07-07T15:34:44","slug":"agriculture-in-a-changing-climate-and-society-2","status":"publish","type":"post","link":"https:\/\/bonnefield.com\/fr\/news\/agriculture-in-a-changing-climate-and-society-2\/","title":{"rendered":"Partie I\u00a0:\u00a0L&#039;agriculture dans un climat et une soci\u00e9t\u00e9 en \u00e9volution"},"content":{"rendered":"<p><em>Remarque\u00a0: cet article a \u00e9t\u00e9 publi\u00e9 pour la premi\u00e8re fois dans Global AgInvesting le 21 mars 2019.\u00a0<a href=\"http:\/\/www.globalaginvesting.com\/contributed-content-agriculture-changing-climate-society\/\" target=\"_blank\" rel=\"noopener noreferrer\">globalaginvesting.com.<\/a>\u00a0Ceci est le premier article d&#039;une s\u00e9rie publi\u00e9e par GAI News. La s\u00e9rie en huit parties examinera comment le syst\u00e8me alimentaire mondial est appel\u00e9 \u00e0 \u00eatre modifi\u00e9 par huit tendances existantes.\u00a0<\/em><\/p>\n<p><em>Auteur principal\u00a0: Jeremy Stroud, Bonnefield, analyste des investissements agricoles<\/em><\/p>\n<p><em>Auteurs collaborateurs\u00a0: Michael DeSa, AGD Consulting et Solomon Tiruneh, AGD Consulting<\/em><\/p>\n<p>Nul n'ignore que notre syst\u00e8me alimentaire mondial est en pleine mutation. Au cours du si\u00e8cle prochain, nous devrons relever le d\u00e9fi de produire davantage de nourriture avec moins de terres, par un nombre r\u00e9duit d'agriculteurs et avec des ressources en eau de plus en plus rares. Bien que tout porte \u00e0 croire que l'humanit\u00e9 en est capable, il est imp\u00e9ratif d'examiner les changements \u00e0 pr\u00e9voir face \u00e0 la variabilit\u00e9 climatique et d\u00e9mographique de la plan\u00e8te. Cette s\u00e9rie d'articles vise \u00e0 \u00e9clairer ces changements et \u00e0 mettre en lumi\u00e8re les r\u00e9gions les mieux plac\u00e9es pour y faire face. Alors que d'autres r\u00e9gions du monde devraient conna\u00eetre des conditions particuli\u00e8rement difficiles, certains secteurs des syst\u00e8mes agricoles canadien et am\u00e9ricain sont en mesure de r\u00e9sister et m\u00eame de prosp\u00e9rer malgr\u00e9 l'\u00e9volution du climat et de la d\u00e9mographie.<\/p>\n<p>Une combinaison de litt\u00e9rature industrielle et universitaire indique huit tendances existantes qui sont appel\u00e9es \u00e0 modifier la structure de notre syst\u00e8me alimentaire mondial. Un nombre croissant de donn\u00e9es indiquent que ces facteurs peuvent d\u00e9terminer notre succ\u00e8s ou notre \u00e9chec collectif\u00a0:<\/p>\n<p>1. Expansion urbaine<\/p>\n<p>2. \u00c9rosion et d\u00e9gradation des terres<\/p>\n<p>3. La raret\u00e9 de l'eau douce et la d\u00e9pendance de l'agriculture \u00e0 l'\u00e9gard de l'irrigation<\/p>\n<p>4. Augmentation des temp\u00e9ratures et du CO<sub>2<\/sub>\u00a0les niveaux<\/p>\n<p>5. Volatilit\u00e9 des syst\u00e8mes m\u00e9t\u00e9orologiques<\/p>\n<p>6. Surconsommation mondiale de phosphate<\/p>\n<p>7. Mortalit\u00e9s d\u2019abeilles et pollinisation<\/p>\n<p>8. Croissance d\u00e9mographique proportionnelle aux terres arables<\/p>\n<p>Comme pour tout march\u00e9 en \u00e9volution, les mouvements structurels peuvent conduire \u00e0 des inefficacit\u00e9s qui sont ensuite corrig\u00e9es par les activit\u00e9s des acteurs du march\u00e9. Dans ce cas, le secteur agroalimentaire mondial pourrait \u00eatre confront\u00e9 \u00e0 d\u2019importantes contraintes de ressources et \u00e0 des changements dans les pools de capitaux au cours du prochain demi-si\u00e8cle. Cela peut cr\u00e9er un environnement permettant aux entit\u00e9s publiques et priv\u00e9es de cr\u00e9er des gains d&#039;efficacit\u00e9 en allouant des capitaux \u00e0 de nouveaux projets d&#039;infrastructure, \u00e0 des alternatives de financement accessibles, \u00e0 une consolidation synergique, \u00e0 des politiques progressistes et \u00e0 une innovation dirig\u00e9e par l&#039;industrie.<\/p>\n<p>Commen\u00e7ons par un sujet qui nous concerne tous : l\u2019expansion urbaine.<\/p>\n<p><strong>Expansion urbaine<\/strong><\/p>\n<p>Il est ind\u00e9niable que certaines des terres les plus fertiles du monde sont aujourd'hui recouvertes de plusieurs couches de b\u00e9ton. \u00c0 l'origine, les villes se sont d\u00e9velopp\u00e9es en fonction de leur proximit\u00e9 avec des terres agricoles productives et de leur importance strat\u00e9gique. Avec l'exode rural, les grandes villes du monde s'\u00e9tendent naturellement. En l'absence de contraintes g\u00e9ographiques ou r\u00e9glementaires, elles empi\u00e8tent sur les terres agricoles qui, historiquement, les nourrissaient. Actuellement, dans les pays en d\u00e9veloppement, l'urbanisation s'acc\u00e9l\u00e8re, 40 % de cette urbanisation se concentrant dans les bidonvilles \u2013 une tendance qui devrait accentuer les in\u00e9galit\u00e9s socio-\u00e9conomiques r\u00e9gionales et les probl\u00e8mes d'acc\u00e8s \u00e0 l'assainissement. La population urbaine mondiale devrait augmenter de 2,5 milliards de personnes d'ici 2050, dont pr\u00e8s de 900 millions pour l'Inde, la Chine et le Nig\u00e9ria. La figure 1 illustre cette \u00e9volution mondiale des populations urbaines et rurales.<\/p>\n<p><img decoding=\"async\" data-src=\"http:\/\/www.globalaginvesting.com\/wp-content\/uploads\/2019\/03\/UrbanExpansionImageB.png\" alt=\"UrbanExpansionImageB\" width=\"613\" height=\"272\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 613px; --smush-placeholder-aspect-ratio: 613\/272;\" \/><\/p>\n<p><strong>Figure 1 : Projection des habitations urbaines et rurales, 1950 \u2013 2050<br \/>\n<\/strong><em>Source:\u00a0<\/em><a href=\"https:\/\/population.un.org\/wup\/\" target=\"_blank\" rel=\"noopener noreferrer\"><em>Nations Unies, Perspectives de l&#039;urbanisation mondiale<\/em><\/a><em>\u00a0\u2013 R\u00e9vision 2018<\/em><\/p>\n<p>L'expansion urbaine devrait r\u00e9duire la superficie mondiale des terres cultiv\u00e9es de 47 millions d'acres entre 2015 et 2030, et ce, sur des terres dont la productivit\u00e9 est sup\u00e9rieure de 77 % \u00e0 la moyenne. Ce ph\u00e9nom\u00e8ne est particuli\u00e8rement pr\u00e9occupant dans les pays en d\u00e9veloppement, o\u00f9 la croissance d\u00e9mographique sera la plus forte dans les zones m\u00e9ga-urbaines. Pr\u00e8s de 90 % des pertes mondiales de terres cultiv\u00e9es dues \u00e0 l'expansion urbaine se produiront en Asie et en Afrique. La figure 2 illustre les zones fertiles qui seront les plus durement touch\u00e9es par l'expansion urbaine.<\/p>\n<p><img decoding=\"async\" data-src=\"http:\/\/www.globalaginvesting.com\/wp-content\/uploads\/2019\/03\/UrbanExpansionImageA.jpg\" alt=\"UrbanExpansionImageA\" width=\"555\" height=\"385\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 555px; --smush-placeholder-aspect-ratio: 555\/385;\" \/><\/p>\n<p><strong>Figure 2\u00a0: Carte de projection de l\u2019expansion urbaine, vers 2030<br \/>\n<\/strong><em>Source:\u00a0<\/em><a href=\"https:\/\/www.pnas.org\/content\/114\/34\/8939\" target=\"_blank\" rel=\"noopener noreferrer\"><em>Actes de l&#039;Acad\u00e9mie nationale des sciences<\/em><\/a><em>, 2016<\/em><\/p>\n<p>Les r\u00e9gions productrices de cultures sont beaucoup moins touch\u00e9es par l\u2019urbanisation dans les pays dot\u00e9s de centres de population dispers\u00e9s, d\u2019abondance de ressources fonci\u00e8res et de r\u00e9glementations proactives en mati\u00e8re d\u2019utilisation des terres, comme au Canada, aux \u00c9tats-Unis et en Australie. Au Canada, par exemple, les lois sur la ceinture de verdure et les r\u00e9serves de terres agricoles du Golden Horseshoe prot\u00e8gent collectivement plus de 13 millions d&#039;acres de terres agricoles productives. Bien qu\u2019il puisse \u00eatre \u00e9conomiquement logique que les villes se d\u00e9veloppent vers l\u2019ext\u00e9rieur plut\u00f4t que vers le haut, les barri\u00e8res g\u00e9ographiques naturelles \u00e0 l\u2019expansion urbaine ont contribu\u00e9 \u00e0 la cr\u00e9ation de certaines des villes les plus prosp\u00e8res et les plus concentr\u00e9es de la plan\u00e8te, comme New York et Singapour. L\u2019augmentation de la densit\u00e9 urbaine (qu\u2019elle soit une cons\u00e9quence de n\u00e9cessit\u00e9 ou de planification) a \u00e9galement \u00e9t\u00e9 corr\u00e9l\u00e9e \u00e0 une augmentation de la productivit\u00e9 et des salaires en raison des \u00e9conomies de co\u00fbts d\u00e9coulant de l\u2019agglom\u00e9ration urbaine.<\/p>\n<p><strong>Expansion urbaine et investissement agricole<\/strong><\/p>\n<p>Avec l\u2019\u00e9mergence de pr\u00e9occupations li\u00e9es \u00e0 l\u2019expansion urbaine et \u00e0 ses effets sur l\u2019agriculture, nos esprits se tournent naturellement vers les m\u00e9rites de l\u2019agriculture en int\u00e9rieur comme solution \u00e0 la perte de terres agricoles. Alors que les projets d&#039;agriculture urbaine et de culture en serre se sont d\u00e9velopp\u00e9s rapidement en raison des r\u00e9cents progr\u00e8s technologiques et de l&#039;acc\u00e8s au financement en capital-risque, les types d&#039;aliments cultiv\u00e9s dans des espaces clos excluent g\u00e9n\u00e9ralement les c\u00e9r\u00e9ales, les ol\u00e9agineux, les l\u00e9gumineuses, les l\u00e9gumes de plein champ et les cultures permanentes cultiv\u00e9es dans les fermes. L\u2019avenir de notre syst\u00e8me alimentaire consistera probablement en une combinaison compl\u00e9mentaire de m\u00e9thodes agricoles int\u00e9rieures \u00e0 temp\u00e9rature contr\u00f4l\u00e9e et en ext\u00e9rieur traditionnel plut\u00f4t qu\u2019en une seule. Les investissements des deux c\u00f4t\u00e9s du spectre de la production agricole devraient g\u00e9n\u00e9rer des rendements ajust\u00e9s au risque similaires sur le long terme, bien qu\u2019avec des niveaux diff\u00e9rents de volatilit\u00e9, d\u2019appr\u00e9ciation du capital des actifs, de flux de tr\u00e9sorerie, de risques op\u00e9rationnels et de sensibilit\u00e9 aux fluctuations des prix des mati\u00e8res premi\u00e8res.<\/p>\n<p>Dans le contexte de l\u2019urbanisation mondiale, les terres agricoles situ\u00e9es \u00e0 la p\u00e9riph\u00e9rie d\u2019une ville en croissance g\u00e9n\u00e8rent g\u00e9n\u00e9ralement des prix plus \u00e9lev\u00e9s en fonction de leur potentiel de d\u00e9veloppement. Ces terres ne sont plus valoris\u00e9es pour leur capacit\u00e9 agricole productive et seraient consid\u00e9r\u00e9es comme une classe d\u2019investissement totalement diff\u00e9rente. Certains des investissements agricoles les plus s\u00fbrs et les plus fondamentalement sains disponibles sont situ\u00e9s \u00e0 proximit\u00e9 suffisamment proche pour approvisionner les villes en croissance en aliments frais, mais suffisamment loin pour ne pas b\u00e9n\u00e9ficier de primes de d\u00e9veloppement. Ces atouts se pr\u00eatent naturellement \u00e0 la poursuite des objectifs de d\u00e9veloppement durable gr\u00e2ce \u00e0 la protection des terres agricoles et \u00e0 leur fonction d\u2019alimentation d\u2019un march\u00e9 orient\u00e9 vers la demande. De plus, ils conservent leur efficacit\u00e9 logistique et leur dur\u00e9e de conservation, en particulier pour les produits directement consomm\u00e9s. Un investissement de ce type peut \u00e9galement \u00eatre optimis\u00e9 et \u00e9tendu \u00e0 long terme pour accro\u00eetre les \u00e9conomies d\u2019\u00e9chelle et la capacit\u00e9 de production de diff\u00e9rents types de cultures.<\/p>\n<p>Alors que les terres agricoles productives se rar\u00e9fieront au cours du prochain si\u00e8cle, les terres fertiles ont toutes les raisons de prosp\u00e9rer.<\/p>\n<p><strong>NOTES DE FIN<\/strong><\/p>\n<p>1\u00a0<a href=\"http:\/\/www.unwater.org\/publications\/world-water-development-report-2018\/\" target=\"_blank\" rel=\"noopener noreferrer\">Faits sur l&#039;eau des Nations Unies<\/a>, 2018<br \/>\n2\u00a0<a href=\"https:\/\/www.pnas.org\/content\/114\/34\/8939\" target=\"_blank\" rel=\"noopener noreferrer\">Actes de l&#039;Acad\u00e9mie nationale des sciences<\/a>, 2016<br \/>\n3\u00a0<a href=\"https:\/\/www.ncbi.nlm.nih.gov\/pmc\/articles\/PMC5576775\/\" target=\"_blank\" rel=\"noopener noreferrer\">Actes de l&#039;Acad\u00e9mie nationale des sciences<\/a>, 2017<br \/>\n4\u00a0<a href=\"http:\/\/large.stanford.edu\/courses\/2016\/ph240\/swafford2\/docs\/banerjee.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Journal d&#039;\u00e9tudes agricoles<\/a>, 2014<br \/>\n5\u00a0<a href=\"https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15487733.2017.1394054\" target=\"_blank\" rel=\"noopener noreferrer\">Journal of Sustainability\u00a0: science, pratique et politique<\/a>, 2017<\/p>\n<p><strong>LES R\u00c9F\u00c9RENCES<\/strong><\/p>\n<p>Nations Unies (2018). Rapport mondial sur la mise en valeur des ressources en eau, Solutions fond\u00e9es sur la nature pour l&#039;eau.\u00a0<a href=\"http:\/\/www.unwater.org\/publications\/world-water-development-report-2018\/\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.unwater.org\/publications\/world-water-development-report-2018\/<\/a><\/p>\n<p>D'Amour et al. (2016). Actes de l'Acad\u00e9mie nationale des sciences. Expansion future des terres urbaines et implications pour les terres cultiv\u00e9es mondiales.\u00a0<a href=\"https:\/\/www.pnas.org\/content\/114\/34\/8939\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.pnas.org\/content\/114\/34\/8939<\/a><\/p>\n<p>Nations Unies (2018). Perspectives d&#039;urbanisation mondiale, r\u00e9vision 2018.<br \/>\n<a href=\"https:\/\/population.un.org\/wup\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/population.un.org\/wup\/<\/a><\/p>\n<p>G\u00fcneralp et al. (2017). Actes de l&#039;Acad\u00e9mie nationale des sciences. Sc\u00e9narios mondiaux de densit\u00e9 urbaine et ses impacts sur la consommation \u00e9nerg\u00e9tique des b\u00e2timents jusqu&#039;en 2050.\u00a0<a href=\"https:\/\/www.pnas.org\/content\/early\/2017\/01\/03\/1606035114\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.pnas.org\/content\/early\/2017\/01\/03\/1606035114<\/a><\/p>\n<p>Banerjee et Adenaeuer (2014). Journal d&#039;\u00e9tudes agricoles, MacroThink Institute. L&#039;\u00e9conomie de l&#039;agriculture verticale.\u00a0<a href=\"http:\/\/www.macrothink.org\/journal\/index.php\/jas\/article\/view\/4526\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/www.macrothink.org\/journal\/index.php\/jas\/article\/view\/4526<\/a><\/p>\n<p>Benke et Tomkins (2018). Journal of Sustainability\u00a0: science, pratique et politique. Syst\u00e8mes de production alimentaire du futur\u00a0: agriculture verticale et agriculture \u00e0 environnement contr\u00f4l\u00e9.<br \/>\n<a href=\"https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15487733.2017.1394054\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.tandfonline.com\/doi\/full\/10.1080\/15487733.2017.1394054<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p><em>Remarque\u00a0: cet article a \u00e9t\u00e9 publi\u00e9 pour la premi\u00e8re fois dans Global AgInvesting le 21 mars 2019.\u00a0<a href=\"http:\/\/www.globalaginvesting.com\/contributed-content-agriculture-changing-climate-society\/\" target=\"_blank\" rel=\"noopener noreferrer\">globalaginvesting.com.<\/a>\u00a0Ceci est le premier article d&#039;une s\u00e9rie publi\u00e9e par GAI News. La s\u00e9rie en huit parties examinera comment le syst\u00e8me alimentaire mondial est appel\u00e9 \u00e0 \u00eatre modifi\u00e9 par huit tendances existantes.\u00a0<\/em><br \/>\n<em>Primary author: Jeremy Stroud,<\/em><\/p>","protected":false},"author":252,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[236],"tags":[],"class_list":["post-31919","post","type-post","status-publish","format-standard","hentry","category-quarterly-newsletters-insights"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Part I: Agriculture in a Changing Climate and Society - Bonnefield<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bonnefield.com\/fr\/news\/agriculture-in-a-changing-climate-and-society-2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Part I: Agriculture in a Changing Climate and Society - Bonnefield\" \/>\n<meta property=\"og:description\" content=\"Note: this article first appeared in Global AgInvesting on March 21, 2019\u00a0globalaginvesting.com.\u00a0This is the first article of a series published by GAI News. 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