| Mazty said: It's speculative, but there is very good evidence to suggest it is anthropogenically caused. Ignoring the facts or pretending they aren't there is just naiveity at it's worst. Sadly you probably don't have the required access to the papers that state the information (I've sourced notes), but here's one of many carbon delta 13 sources: You do realise oxygen levels were 10% of what they are today? Claiming the Cambrian period levels are acceptable would pretty much kill all large animals on this planet. You need to question what you read more as you are just swallowing anything that's thrown your way. Ever heard of the Vostok ice cores? Nope? Well then please, stop talking about something you have clearly never, ever been educated on. Seriously. Here, go read: "Finally, CO2 and CH4 concentrations are strongly correlated with Antarctic temperatures; this is because, overall, our results support the idea that greenhouse gases have contributed significantly to the glacial–interglacial change. This correlation, together with the uniquely elevated concentrations of these gases today, is of relevance with respect to the continuing debate on the future of Earth’s climate." Now that that is sorted, you have to consider two things. |
Protip: Internet memes and nonsensical acronyms such as Protip and L2Science are banality at its finest and serve to display the relative maturity level of the debator. Leave them at the door if you wish to continue.
There is some evidence for human impact, but as I've stated previously, our contribution is about 0.3% to the greenhouse effect in regard to CO2. In other words, negligible.
Your C13 source states nothing. All it says is that we can measure human C13 from natural C13 due to its depletion. Beyond that, it says nothing. Completely irrelevant. Waste of time.
Stating that Oxygen levels 600 million years ago were 90% without a single source. Not considered and I couldnt find a single document backing up your claim, at best scientists have concluded that the levels were "like today".
I had not heard of the Vostok ice cores. But your quotation does not pertain to human impact, only to natural impact of greenhouse gasses. So, again, irrelevant to supporting your claim of anthropogenic warming. I already know that the greenhouse gasses cause global warming along with the sun.
1) No. 0.3% is meaningless.
2) No, it isn't. See above.
Did you have anything of value in regards to anthropogenic climate change or are you just content to cite sources that do not even pertain to that standpoint?








