Bonn — Behind wrangling at UN climate talks over financial aid for poor countries dealing with increasingly extreme weather and bracing for worse to come, real-world projects that can save livelihoods — and sometimes lives — are queued up, waiting for approval and money. Rich countries are slowly opening the spigots to help reinforce coastlines sinking under rising seas, convert agriculture to drought-resistant crops, or switch public transportation from petrol to electricity powered by the sun and wind. Tens of billions of dollars — the true figure is sharply contested — from public and private sources are now flowing every year. But that falls well short of the $100bn a year promised from 2020, and is a pittance compared with the trillions experts agree will be needed to engineer the global transition to a green economy. The 197-nation Paris climate treaty calls for capping the rise in temperature to "well below" 2°C, and pressure is mounting to set the bar even lower at 1.5°C. Th...

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