As others have pointed out, humidity is the main reason why going into the shade does or doesn't feel significantly cooler than being out in the sun. Also, your body adjust somewhat to the heat, so that shade at temperatures that would have felt warm to your winter-adjusted body instead feels cool (this is also why you'll see people recently from cold climates wearing shorts in the winter in places like California and Arizona--our winter temperatures are close to their summer temperatures). The change in temperature from AGW isn't much, in terms of how we experience heat (it's less than the typical change in a single day, even in places that *aren't* deserts). But since it's all over, it has some subtle but real systemic effects on things like circulation patterns and rainfall.
CFCs affected Antarctica most because the ozone layer was thinnest there naturally. The CFCs were pretty well mixed in the atmosphere, so they're actually affecting the ozone layer *everywhere*, but because of how ozone is formed, most places still have enough ozone to block most of the incoming high-energy UV. But the naturally thin Antarctic ozone (and to a slightly lesser extent Arctic ozone) went from "thin" to "virtually nonexistent" because of CFCs. This is, for the most part, a completely separate issue from AGW and CO2, and was dealt with by banning CFCs for most purposes.
And the reason California can be in a drought with all that ocean water evaporating? For the most part, relative humidity (the percentage of water in the air relative to the maximum it can hold) hasn't changed. Absolute humidity (the total amount of water in the air) has gone up. And, since the air can hold more water total, it's easier for any evaporated ocean water to just pass over California without raining on it, instead going on to other areas that have traditionally gotten more rain.
1. There is no penalty on this site for deliberately false answers, and the global warming category is loaded with anti-science deniers. Be careful. They are relatively dense, but trickery is their main currency, and they are not also forthright about their pro-fossil-fuel industry agenda (sometimes because they've been duped into not realizing it).
2. Smog is not CO2. They are more like opposites. Smog is what happens when other things besides CO2 and water come out of the exhaust when carbon fuels are burned to generate energy.
3. The ozone hole overlaps slightly in terms of cause and effect, but is fundamentally a completely different and unrelated problem to global warming.
4. Global warming concerns the global climate. Any local climate in a place such as the LA basin will be affected by the global trends, of course, but local effects will dominate.
5. It is easier to cool off in the shade in a place, such as LA, that is relatively dry.
6. Ocean water evaporates more when it is hotter, but the rain does not necessarily come down right near where the ocean water evaporated. If the only thing that happened with climate change (as deniers sometimes pretend) was that every place around the world got very gradually warmer, a few degrees per century, there would indeed be not much to be concerned about. What scientists have discovered, however, is that main effect is not the change in the average climate and weather, but the increased variation (more drought and more floods, fiercer storms and longer doldrums, etc), on top of all the secondary effects on ocean acidity, snowpacks, sea levels, eco-systems, the health of forests, etc.
First, I doubt you would be able to tell the difference between different type of heat. The difference in feel of the oven heat you describe has more to do with the amount of heat and the humidity of the air.
Second, we are talking about a global change in temps of 0.8 degrees over the past 100 years. You are not even going to feel or notice the difference. Joe Joyce made some claim about how the climate of New York has changed over the past 60 years, but that is all nonsense. The change is not currently large enough to notice changes like that. The heat you are feeling is because you live in LA.
Consider that over the course of a year, the temperature is going to fluctuate by more than 60 degrees celsius, you ar enot going to feel 0.8 degrees over a 100 years period.
Now as far as global warming occurring, that is occurring, of the 0.8 degrees, likely 0.5-0.6 of it is caused by man. We need to reduce our CO2 emission, but this is nowhere near the climate apocalypse that the media portrays. There have been no increases in hurricanes, tornadoes, floods, droughts, or any other extreme weather events. The climate models are and have been overestimating the warming. In short, this is a problem NOT a crisis or a catastrophe.
Firstly I suggest you google the green house effect. Not what causes it but the mechanism itself. Then look into the composition of greenhouse gasses of which you'll be surprised to find is not what is commonly thought.
Your point about "oven heat" is a little of a none point. Heat is heat regardless of the source it comes from above and hits the earth either directly from the sun or from the green house effect which means if your in the shade your getting less heat.
Once you've looked over those things you'll be finding you have other questions which you should try find the answer too.
I suggest if you want an easier way to get both sides of the argument watch "an inconvenient truth" followed by "the great global warming swindle"
Personally I don't believe that global warming is affected significantly by humans, this has been occurring for thousands of years
I live in Los Angeles, one of the worst offenders of smog/co2 emissions. But this extreme heat doesn't feel like trapped heat from greenhouse gases. It feels like direct heat. In fact, if I go under shade, I can feel cool. In humid locations, going under shade still feels hot because it's in the air.. How come going under shade doesn't feel like oven heat?
Also, they talk a lot about Antarctica melting and blaming that on global warming (greenhouse gases), but when I tried understanding ozone holes, thinking about Australia's ozone hole from my memory in the 90s, I saw that a) ok, so ozone holes are caused by CFCs from aerosol spraying, and b) there's a huge ozone hole over Antarctica!
How did our aerosol spraying affect Antarctica the worst, and how does co2 regulations relate in combating that?
Also reminder to my first question, how come the heat doesn't feel like oven heat, but direct heat over LA?
PS, I do believe we have an impact on our environment, so this is not "You believers are foolish" questioning, but an "I'm trying to understand this stuff" questioning.
One more question. How are we in California in a drought?? How come that ocean water isn't evaporating into the atmosphere and giving us rain??
