Negotiators meeting in Poland have agreed a way forward on curbing deforestation.
A package of measures has been agreed here that will give "results-based" payments to developing nations that cut carbon by leaving trees standing.
One observer told the BBC that this was the "signature achievement" of these talks.
Deforestation accounts for about 20% of global emissions of carbon dioxide.
Earlier this week the UK, US, Norway and Germany agreed a $280m package of finance that will be managed by the World Bank's BioCarbon fund to promote more sustainable use of land.
Now negotiators have agreed a package of decisions that will reduce emissions from deforestation and forest degradation plus pro-forest acitivities (known as Redd+).
The conference agreed a "results based" payments system that means that countries with forests will have to provide information on safeguards for local communities or biodiversity before they can receive any money.