Fascinating, how all the denialists now spout the "it's just a trace" stupidity. No one with a 3-digit IQ would say something that stupid, but pretty much all of them now repeat it. It's obviously yet another of their herd-identity things, because if there's one thing the denialists here do well, it's displaying their absolute unquestioning devotion to their herd. Once any idea takes root with a few of them, they will all start babbling it, no matter how dumb it is, because disagreeing with a fellow herd member is strictly forbidden.
Arguing man's interference with nature is questionable at best, imho. Ozone, that famous culprit greenhouse gas, traps heat. Even so, as the ozone layer gets smaller, some try to say that man is villain in it all. That's silly, because Ozone traps heat that would otherwise dissipate into space if it weren't there. When Ozone holes enlarge, less heat is trapped. So argument that man's influence is heating the earth is not exactly true. I mean, really, it is either true or it is not true.
According to science, the earth is 6 billion years old
Human pollution as we know it began 500 years ago.
Temperature changes have been constant for millions of years.
Science has taken a sinister turn in the last 50 years to ignore the most important data of all: earthly water vapor, produced solely by nature and not by any anthropogenic sources to speak of.
And recent scientific studies have put man's contribution to air pollution at less than one one-thousandth of a percent when water vapor is taken into account. The devious foundation-money-procurement angle of omitting water vapor from the data predicting "global warming" has been busted for several years now.
Yet, people cling to the studies that ignore 95% that nature's own (and not anthropogenic pollution) is the only supplier. Only 5% of other aspects come from mainly volcanos and terrestrial sources, solar flares (extraterrestrial), and other phenomena such as the vast area in Canada that emits plumes of sulphur gases into the atmosphere.
By far, it seems to me that things anthropogenic pollution is being blamed for as high as 25% of all pollutants are minimal when the impact of only one volcano can dwarf all of man's pollutants for the past 200 years. Only one. This earth has 50 or more volcanic eruptions per annum, and always has had.
If we wish to eliminate the anthropogenic pollution in an area the size of California, the best way would be to reduce the size of human population to around 700,000, which would be quite a drop from the 25 millions or more who currently occupy the area. I don't think we want to exactly go there, but I will grant that the high density of population and number of exhaust pipes responsible for getting people to and from work to home and recreational excursions is not a pretty sight and causes countless people to suffer from allergenic annoyances which vary from person to person.
It's a big world, and we could take better care of it, no less. But instead of doing that, we compound the insult when we follow scientists who blame it all on us for foundation grants to continue earning a living from "science," which should be about truth, and not about making a living by twisting data to suit a comfortable existence based on improperly-gathered data that troubles others instead of affirm the fickle finger of mother nature, who is responsible for 99.9996 of all of it, and not mankind.