The Consensus Among Climate Scientists: Humans are Causing Climate Change
TLDR Despite skepticism from some, 97% of climate scientists agree that climate change is caused by human activities. The burning of fossil fuels is the main cause, leading to significant changes such as more intense wildfires, shifts in animal migration patterns, and a threat to the homes of hundreds of thousands of people.
Timestamped Summary
00:00
Despite skepticism from Donald Trump and some Americans, 97% of climate scientists agree that climate change is caused by human activities.
04:32
Scientists are sure that carbon dioxide is warming the world and humans are to blame, and they can measure carbon dioxide down to parts per million.
09:33
In the late 1970s, scientists noticed that the average global surface temperature was rising, and they were able to explain it by combining Svante Arrhenius' theory on carbon dioxide with David Keeling's measurements.
14:42
Carbon dioxide is rising and warming the world, but scientists have had to investigate measurements to determine if humans are responsible for the increase.
19:47
The burning of fossil fuels is the main cause of climate change, as confirmed by measurements of carbon in the air and the consensus among 97% of climate scientists.
24:40
Climate change is already causing significant changes around the world, including more intense wildfires, shifts in animal migration patterns, coral bleaching, shrinking glaciers, and a decrease in sea ice, and it poses a threat to the homes of hundreds of thousands of people.
29:42
Climate modeler David Pierce uses climate models to predict the future and determine the effects of climate change, such as the overall warming of the planet.
34:03
Climate models predict that temperatures will rise by three to five degrees Celsius by the end of the century, resulting in more extreme weather events, but uncertainties remain about the exact impact on sea level rise and how ice sheets will melt.
38:44
There are uncertainties about how high sea levels will rise and how slow the AMOC will get, but it is certain that carbon dioxide is rising, humans caused it, and it is causing the average temperature of the planet to rise.
43:38
The biggest uncertainty in how fast our world will warm is our actions and how much carbon dioxide we choose to keep emitting.