Quote:
Originally Posted by MartinSE
First you completely misstated my position. I post what the majority of people in the field say. Not a simple majority but 99%. I defer to them, theirs is NOT opinion, they are peer reviewed and confirmed.
Then you built a straw man to argue with saying "all climate change is caused by humans" neither I or ANYONE I quote has ever said that. So, FACT you claim has been said is not true.
And finally people postings statements as FACTs without providing any basis is NOT a basis for any form of discussion. I asked for references to support the claims, none have been forth coming.
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FACT-Your stated quote
"More than 99.9% of peer-reviewed scientific papers agree that climate change is mainly caused by humans, according to a new survey of 88,125 climate-related studies."
Climate change has been happening since time began and your stated fact is that above "mainly caused by humans". If you want to argue with "all" vs mainly, have at it.
It still is not a valid fact. You ignore history of significant climate changes as reconstructed by other scientists. Climate changes occur naturally. Things can affect climate change such as volcanos, asteroids, solar cycles, earth tilt. Have humans affected climate change? Yes, by creating cities that become heat sinks, cutting down forests, draining lakes, and possible pollutants. But clearing pollutants from the air may also affect climate change. Clearing the air from pollution such as smog, while being good for our health, may have the effect of contributing to a higher temperature.
If you refer to the chart displayed of the planetary cycle of glacial and interglacial periods, we are currently well within the norms of what has happened in the past, despite the fact that there are humans now. When you consider that a mere 12,000 years ago the Great Lakes and Niagara Falls were just being formed by a climate change much larger than a rise in temperature noted recently.
If you premised your discussion to the last 40 years, which by some studies indicates a global temperature rise of somewhere near 2 degrees F, your stated claim of impact on climate change by humans starts to have some validity.
Then, you can perhaps cite some studies that evaluate how human activities could affect rises and drops in average temperature. But be careful to note that there are certain human activities that lower temps and some that raise temps.
I don't have any facts but do have observations. The air appears cleaner now than it was in the 60's and 70's most likely due to human efforts limit smog and smoke. The temp rise of about 2 degrees seems to have occurred coincident with that improvement. Major efforts were made to install smoke scrubbers, catalytic converters etc.
Perhaps some of that clean air may have assisted some of the noted raise in temp.