nonna it will require reducing our carbon dioxide emissions over the coming decades. implications to that a fundamental changes to society about how we generate our electricity, how we travel around, what died we have. those are the difficult choices that the global community needs to take. professor ed hawkins have summarised the average global tablature is in this simple graphic with 1850 on the left and the present day on the right. what you see from 1850 up to 2018 is that global temperatures over that time have risen by about one degree with lots of variations from year these rising temperatures will lead to more and more extreme weather. it certainly has been extreme recently. australia hasjust suffered its hottest month on record with wildfires in the south, floods in the north and temperatures of nearly 50 celsius. at the same time, the us is being gripped by a vortex of polar air. here temperatures have dropped to nearly —50. injapan, severe and unpredictable weather events happen yearly, making precise weather information critical for disaster preparedness.