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A: Here's a simple definition of global warming. (And yes, it's really happening.) Over the past 50 years, the average global temperature has increased at the fastest rate in recorded history. And experts see the trend is accelerating: All but one of the 16 hottest years in NASA’s 134-year record have occurred since 2000.
Climate change deniers have argued that there has been a “pause” or a “slowdown” in rising global temperatures, but several recent studies, including a 2015 paper published in the journal Science, have disproved this claim. And scientists say that unless we curb global-warming emissions, average U.S. temperatures could increase by up to 10 degrees Fahrenheit over the next century.
We humans have been neglecting climate change since long time and did not take any concrete step, so the above article gives us an insight or a feeling of a need to bring change in human activity and by that we can bring change in environmental and climatic conditions that will make our future and present more sustainable. The bio diversity is also effected due to the negative changes in climate. If we won't stop now then we could never.