we'd be heading one of the interesting things is that scientists have been able to observe since the one nine hundred sixty s. half a degree. in the rise of well temperatures and looking at the impacts of climate change and of that rise in temperatures i say just half a degree and what they've seen is that there's been a substantial increase in what they call extreme weather events we've seen just this year a devastating hurricane season in the caribbean we've seen droughts in eastern africa and southern africa we've seen heavy flooding in south asia all of this claiming thousands of lives causing billions in economic costs and as i say that's just with harford degree. celsius in rise in the rise of global temperatures so what's it going to be with three degrees i think you can expect a double triple perhaps