Then either you haven’t found the appropriate studies, or you are simply refusing to believe them. The evidence is very convincing, both that the climate is changing to a significantly warmer one, and that human activity, mainly in the increased rise of greenhouse gases, is contributing significantly to that change.
There is absolutely no doubt that carbon dioxide and methane, amongst others, are gases that increase temperature by trapping some wavelengths of light.
It is also absolutely certain that the concentration of carbon dioxide particularly, and methane, have increased significantly since about the industrial revolution.
We know that the concentrations of these gases changes over time - both increasing and decreasing - but they have done so to a greater extent in the last few hundred years. They are at very high levels, and increasing.
We also know that the oceans are more acidic than they were - which is bad news for much of the marine life. On which we rely for much of our food and oxygen. But even if we didn’t - what right have we to damage these ecosystems?
Similarly on land - many species will not survive the forecast increases in temperature - and some have already been lost through sea-level rises, which are themselves linked to global warming.
There really is no doubt about all this. And I would certainly accept the evidence and conclusions of the scientists studying this, rather than, for instance, people who run oil and gas extraction companies who, like the tobacco company owners, have a vested interest in preventing people from knowing these things.
What can we do? Everything possible, as soon as possible. We are, seriously, running out of time. The nice things is that the things that we can do to reduce the effects of global warming also benefit us in other ways. Less pollution (for instance coal-fired power generation - indeed any burning of coal - releases more radioactive material than nuclear power stations, quite apart from other gases, and internal combustion engines produce known harmful pollutants). And it is cheaper. It’s win-win - except for those with financial interest in continuing with coal, gas and oil burning.
