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Humans are the Primary Cause of Global Warming
The science indicates humans are the primary cause of global warming at the >95% probability (In science that is a virtual certainty)
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Why We Know That Humans are the Cause• The following graphs will show why we know that
humans are the primary cause of global warming.• There is a direct correlation between the measured
human emissions of greenhouse gases, the rise in atmospheric greenhouse gases, and the rise in temperature. The rates of increase in each is unprecedented.
• There is a direct correlation between the growth in the human population and the rise in greenhouse gases and temperature.
• Computer simulations indicate that only human-caused emissions of greenhouse gases can cause the observed rise in temperature of the atmosphere and other Earth systems (Oceans, Continents and Ice).
• No other natural causes can account for the present rapid rise in temperature and CO2. The present rate CO2 increase is about 20,000 faster than natural rates.
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Climate Drivers
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Temperature, CO2 Concentrations and Carbon Emissions
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The rate of emissions and amount of increase in CO2 is Unprecedented
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Only Human-caused Greenhouse Gas Emissions Can Account for Global Warming
• The black line is the observed temperature rise.
• The red area is computer simulations of all emissions, including human.
• The blue area is computer simulations of only natural emissions and the increase in solar activity.
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The Warming Oceans
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AerosolsAerosols
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Atmospheric CO2 and Population Growth
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Atmospheric CO2 and Population Growth
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Why the increase in Solar Irradiance is NOT the Cause of the present Warming
• The next slides shows that there is NO correlation between Solar Irradiance and the current rise in temperature.
• Instead, they show that humans are the primary cause of global warming.
• If the world does not drastically reduce the emissions of greenhouse gases then we are headed for a catastrophe.
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Solar Irradiance, Temperature, and Atmospheric CO2
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Solar Irradiance, Temperature, and Human-Caused CO2 Emissions