At this time of year, the trees on Alan Risolo's land in central Italy should be groaning with olives. But extreme weather blamed on climate change has ruined his harvest. "Production has fallen by 80 percent," said the 43-year-old farmer from Sabina, north of Rome, despondently holding up a branch with only a few shrivelled green and black olives on it. Known since Roman times for its olive groves, the region boasts trees said to be hundreds, even thousands, of years old. But changing weather patterns are proving hugely challenging. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES