I can’t prove it myself of course, but based on data and research I’ve read, a possible factor in the unusual climate trends that we know are happening at present, may be due to the sun. If so, and we are also seeing warming due to greenhouse gases, deforestation and other human changes to the world, what in reality may be happening is a climate change unlike anything we know of in our historic records and theories about climate change.
That being said, I have no doubts that around 5000 years ago, the global climate was much warmer than it is at present. This is based on the science, and anyone who actually studies climate history knows that the global climate was much warmer than now, from around 8000 to 5000 years ago. It’s one of those hard scientific truths that has existed long before the climate hysteria of late.
We know, with no doubt at all, that all the glaciers in the USA are less than 5000 years old. That during what is called the Climatic Optimum, (or Holocene climatic optimum) the sea level was 3 meters higher, the arctic was ice free, and Greenland had much less ice. The world was warm, and there was no global disaster from it. Trees grew much higher on mountains, forest extended all the way north, and vast bogs and swamps existed year round where there now is permafrost. It’s where all that “stored methane” the alarmists worries about came from in the first place.
If you can get an alarmists to admit all that is true, they then claim the “rate of change” is faster. When that argument fails, it’s back to “civilization developed with conditions blah blah blah blah”, or “the sea level rise will cause”, which may be true.
But there is no methane disaster awaiting, much less any risk of the world ending from it getting warmer. Not anytime soon.