Global warming is absolutely real and is a combination of both natural climatic cycles in addition to human influence.
There has never been a species on this planet that has had such wide ranging impacts as humans have had. So it's absurd to think that we're without any impact on global warming.
The amount of greenhouse gases that humans have released to the atmosphere is quite simply unnatural, and to think that it isn't having an impact is literally insane.
This graph shows the increase in CO2 alone. Other greenhouse gases have also been shown to have increased dramatically. And we're largely the cause of these increases.
Sure, the climate fluctuates over time, but we have dug up and burned an insane amount of fossil fuels which no other species has done before us. We've exposed stuff to the atmosphere that would have sat dormant underground for many thousands of years had we not intervened.
Of course this will have an impact. All those people screaming scam, fraud, conspiracy etc. are simply ignoring the facts. Climate change shouldn't even be debated.
The real scam/ conspiracy here are the governments that don't want to take action because they're simply making so much money of the exploitation of fossil fuels.