— t “The economic impacts are small” c a p ‹t is possible that the economic impacts of climate chane m t i u will be sinle„diit percentaes of gdp but it is also o b possible that the economic impacts will be extremel dam„ s a n o ain‚^ Œien the prospect of catastrophic impacts i t s economists conclude that it is optimal to hede these‚& e u q — Œloball protectin coasts with dƒes has been estimated to reuire annual inestment and maintenance costs of usd12–¡1 billion b 2100 which is much smaller than the lobal damaes that can be aoided with these measures‚* — ‹t is liƒel that there will be sinificant effects on aricul„ ture because the tpe of ecosstem of an estimated ‘ per cent of the world’s land area will chane at 1‚”°C of warm„ in and 1 per cent at 2°C‚( n estimated 1— per cent of insects 1Ÿ per cent of plants and — per cent of ertebrates are prošected to lose oer half of their climaticall deter„ mined eoraphic rane at 2°C warmin‚!) Howeer some prošections enisae ‘peaƒ farmland’ demand in the comin decades drien b increasin efficiencies and declinin population rowth‚!! — t ‘ °C of lobal warmin humid heatwaes with apparent temperatures oer ”” °C would be expected eer second ear‚!@ — ‹f the increase in lobal aerae temperature exceeds Ÿ°C wet„bulb temperatures will bein to permanentl exceed sƒin temperature in some areas of the lobe ›i‚e‚ the human bod will lose its abilit to shed heat as sweatin becomes Ÿ ¢urƒe et al‚ 201”ª — Hinƒel et al‚ 201‘ ˆretis et al‚ 201— ž Hoeh„Œuldber ¡ £itterman 201ª et al‚ 201— Daniel et al‚ 201Ÿ 1 0 Šarren et al‚ 201— 1 1 usubel et al‚ 201 1 2 ’usso et al‚ 201¡ ‘
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