I am a man-caused-Climate Change (Global Warming) skeptic. Where should I start looking for evidence?
Thanks for the question. Skepticism is the basis of science, so I somewhat* respect your point of view.
Note: I’m an adaptation specialist and I manage parts of USAID’s climate adaptation program in over 25 countries. This means I help governments around the world with policies that deal with inevitable impacts from climate change. Basically, I help with natural disaster planning using a bit of climate science, city planning, and environmental law. So, if a city is going to flood, I help a government plan to prevent the flood. If a country’s farming economy is going crash due to drought, I help the government shape a response to prevent crop losses. See what I do, here. Thus, I do not work on carbon or energy policy. I am not an activist. I do not advocate for emissions policies. I’m about as interested in “preventing climate change” as I am interested in becoming the next Dali Lama. That said, this is a very rare instance where I answer a question about carbon, GHGs, and energy. Ok, on to anon’s nice question:
The short answer, anon, is to go here, and probably here. The long (and basic) answer is that you have to contemplate the reason why the earth is warm (vs, say, the moon). The reason is that greenhouse gases (GHGs, e.g., carbon dioxide, methane, nitrous oxide, water vapor, etc.) hold a good amount of the sun’s radiation, thus keeping the earth nice and cozy.
Without these gases, the earth would be like the moon - a dead rock that’s freezing and boiling at the same time: +253F (+123C) during the day; -387F (-233C) at night.
There is no disputing this (deniers [unwittingly] admit this when they make arguments about cycles). When there are more gases in the atmosphere, more of the sun’s radiation is held within the atmosphere, creating a warming effect (and very strange changes in weather events).
The vast majority of climate denial arguments have been debunked years ago. For example, here’s a list of common arguments still used today, but answered back in 2004.
In sum, your starting point is: Why is the earth warm? It’s warm due to GHGs in the atmosphere. And humans are adding a never before seen amount of carbon into the atmosphere, which in turn will wreak unbelievable havoc. Deniers bear the rather obscene burden of showing that GHGs do not keep the earth warm, and that increases in carbon do not influence climate.
I hope those links above help.
All the best,
*A legitimate skeptic applies critical thinking to systematically pick apart arguments. Skeptics do this by analyzing evidence. No one disagrees that GHGs cause warming (even all oil companies on earth admit this, and are searching for solutions to lower GHG emissions). The burden is on you and other deniers to show that greenhouse gases do not influence the earth’s atmosphere. Frankly, in my opinion, this is a rather boring subject. The more interesting subject is that deniers actually do not comprehend their own arguments. In fact, they’re really arguing against *the solutions* to reducing or preventing climate change, which are to raise the costs of fuels and not pay for environmental harm. This gets into societal ethics, personal responsibility, and market capitalism, which are far more (well, marginally) interesting topics.