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The fact that it`s necessary in smaller quantities does not make it harmless in larger quantities. Your argument is silly. There are many things for which both too little and too much are dangerous.
CO2 plays a role in regulating how much heat the Earth gets and retains from the Sun. It should be obvious to anyone that this means there is an optimum range.
Global cooling in the 1970s was a brief media fad stemming from a few comments about ice age cycles.
Global warming today is a consensus from relevant scientists stemming from millions of pieces of data.
When you pretend it`s the same thing, you are just showing your total lack of understanding.
Has anyone else been hearing that penguins and polar bears can`t swim? Or that "climate change" is a bad thing?
You guys are paying attention and taking salt right?
Go ahead and live like a bunch of Africans if you want. I`m switching my electronic transmission control from "economy" to "performance."
Obvously, that 5% isn`t nature. Humans are also very quickly removing natural greenhouse gas capturing mechanisms. Which also isn`t natural, obviously.
[quote]why you think scientists believe the dinosaurs lived in a co2 heated atmosphere? [/quote]
Because there is evidence that they did. There is no evidence that the climate change was as rapid then as it is now, and that`s the main concern.
[quote]in fact that would also make crops flourish[/quote]
While destroying most or all of human civilisation. Not a good trade-off in my opinion.
Humans do affect the environment. Recently, a lot more than before. It might be enough to disrupt natural balances and make Earth much less habitable to humans. There is genuine cause for concern.
Surprisingly, it`s more from burping than farting. Cows belch a lot. Not just cows - it`s basically all ruminants. Cows, oxen, sheep, elephants, etc.
why you think scientists believe the dinosaurs lived in a co2 heated atmosphere? same thing that could happen eventually right now, in fact that would also make crops flourish, look up other theories
For example, the manufacturing of cement emits several times as much CO2 as cars, even if you stretch to include commercial vehicles. Developing and using CO2-absorbing cement (which does exist) would have a far bigger effect than industrially developed countries using vehicles that emit a bit less CO2, or even those countries ruining their economies to reduce vehicle CO2 emissions a bit more (a reduction that would be more than overwhelmed by the increase in industrial CO2 emissions from China, anyway).
CO2 isn`t the only greemhouse gas, or even the worst. Ruminant farm animals have a bigger effect on greenhouse gas emissions than ICE vehicles, due to the amount of methane they emit.
We do need to reduce our impact on the environment, but we need to do it in a way that is most efficient, not a way that is most politically useful.
As someone who supports the environment, I agree that we need more environmentally-friendly cars, but I also know that not many good and cheap ones are available yet... so I personally don`t mind.