2052: scenari globali per i prossimi quarant’anni by Jorgen Randers, G. Bologna PDF

By Jorgen Randers, G. Bologna

ISBN-10: 8866270660

ISBN-13: 9788866270669

1972: su incarico del membership di Roma, un gruppo di studiosi dell’MIT pubblica I Limiti dello sviluppo, che prefigura gli effetti della crescita della popolazione, dei consumi e dell’inquinamento su un pianeta fisicamente limitato. Dopo decenni di critiche feroci, ormai si ammette che le conclusioni di quello studio erano corrette.

2012: Jorgen Randers, uno dei coautori di I limiti dello sviluppo, fa il punto su quanto è successo e prova a delineare il futuro globale da qui al 2052. Vivremo sempre più nelle città, saremo più connessi e creativi, e dovremo trovare nuovi modi in step with gestire le tensioni dovute alle diseguaglianze crescenti. Probabilmente los angeles popolazione non crescerà quanto previsto, con una riduzione degli impatti sulla biosfera, ma le rinnovabili non riusciranno a rimpiazzare i combustibili fossili in pace according to eliminare del tutto l. a. possibilità di un riscaldamento climatico catastrofico... Nessun settore è escluso, e Randers ci mette a disposizione una guida according to interpretare e gestire le turbolenze dei prossimi quarant’anni.

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If we accept this as true it follows that the number of individuals feeding on a host must be relatively small if the parasite, predator, or herbivore population is to be restricted to feeding on interest. F. MAINTENANCE OF BALANCE The balance which exists between parasite and host once achieved is probably maintained by a system of individual genetic heterogeneity. First of all, most resistance is polygenic both in the individual and in the population. The genetic diversity in the individuals of the host population apparently helps protect the host from the parasite in space and time.

If we accept this as true it follows that the number of individuals feeding on a host must be relatively small if the parasite, predator, or herbivore population is to be restricted to feeding on interest. F. MAINTENANCE OF BALANCE The balance which exists between parasite and host once achieved is probably maintained by a system of individual genetic heterogeneity. First of all, most resistance is polygenic both in the individual and in the population. The genetic diversity in the individuals of the host population apparently helps protect the host from the parasite in space and time.

The land area in which ponderosa pine survives has been classified climatologically in many ways (Visher, 1954). A casual survey of the characteristics of the climate of the regions in which the western pine beetle occurs shows several features in common. First, it is a region of extremes characterized by either very cold winters and hot summers or always mild, wet winters and hot, dry summers. All areas are subject to periodic drought and there are conspicuous, sharp seasonal contrasts in precipitation.

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2052: scenari globali per i prossimi quarant’anni by Jorgen Randers, G. Bologna


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