Warming threatens 'half of species'

Global warming could place 25 to 50 percent of species in the Amazon, Madagascar and other biodiverse areas at risk of localized extinction within decades, a report said on Wednesday.

The lower projection is based on a mercury rise of 2 C over pre-Industrial Revolution levels - the warming ceiling the world's nations agreed on in 2015 under the Paris Agreement.

The highest is for out-of-control warming of 4.5 C.