YOKOHAMA, Japan (AP) -- Global warming is driving humanity toward a whole new level of many risks, a United Nations scientific panel reports, warning that the wild climate ride has only just begun.Twenty-first century disasters such as killer heat waves in Europe, wildfires in the United States, droughts in Australia and deadly flooding in Mozambique, Thailand and Pakistan highlight how vulnerable humanity is to extreme weather, says a massive new report from a Nobel Prize-winning group of scientists released early Monday. The dangers are going to worsen as the climate changes even more, the report's authors say, adding that no one is immune.\We're all sitting ducks