Global Warming is caused by humans
Debate Rounds (3)
I only have two points at the moment. So here they are:
(1) Earth's mean surface temperature has increased about 1.2 degrees Fahrenheit. Scientist are more than 90% certain that human activities' such as burning fossil fuels and deforestation, is the primary cause of increases of the greenhouse effect. The Intergovernmental Panel on Climate Change (IPCC) indicates that the global surface temperature is likely to rise a lowest of 2 to 5.2 degrees Fahrenheit and a highest of 4.5 to 11.5 degrees during the 21st century.
(2) According to NASA, human activities are changing the natural greenhouse. Over the last century the burning of fossil fuels like coal and oil have increased the concentration of atmospheric carbon dioxide (CO2)
(1) Volcanoes release very small amounts of carbon dioxide compared to human emissions.
(2) Not only have humans admitted carbon dioxide, but other greenhouse gases such as methane, nitrous oxide, and halocarbons, which are thickening the atmosphere. Thus causing heat to stay trapped close to the Earth's surface.
More importantly, the Sun is now changing from its Solar Grand Maximum to its Solar Grand Minimum. The Earth heats up after a Solar Grand Maximum, lagging a bit after the peak. With a Solar Grand Minimum now on its way, a "global cooling" may be on the horizon"a natural oscillation occurring in much longer solar cycles.
Latest science reveals that sharp increases in global warming "precede" sharp increases in CO2"not the other way around. Global warming causes more CO2 to be released form the oceans. Current research also shows that Earth"s oceans are now beginning to cool. It is also now clear that temperatures over the last century correlate far better with cycles in oceans than they do with carbon dioxide; and, the temperature cycles in oceans are caused by cycles of the sun.
(1) Natural Geographic News states "Global warming is here, it's human-caused, and it will continue for centuries even if greenhouse-gas emissions are stabilized".
(2) "The first piece of evidence that the warming over the past few decades isn"t part of a natural cycle is how fast the change is happening. The biggest temperature swings our planet has experienced in the past million years are the ice ages. Based on a combination of paleoclimate data and models, scientists estimate that when ice ages have ended in the past, it has taken about 5,000 years for the planet to warm between 4 and 7 degrees Celsius. The warming of the past century"0.7 degrees Celsius"is roughly eight times faster than the ice-age-recovery warming on average.
The second reason that scientists think the current warming is not from natural influences is that, over the past century, scientists from all over the world have been collecting data on natural factors that influence climate"things like changes in the Sun"s brightness, major volcanic eruptions, and cycles such as El Ni"o and the Pacific Decadal Oscillation. These observations have failed to show any long-term changes that could fully account for the recent, rapid warming of Earth"s temperature." states NASA's earth observatory.
Therefore I conclude my argument. Thank you got being a good opponent.
p3ngwyn56 forfeited this round.
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