You do realize that the scale of that graph on your source is not at all linear? We see rapid changes in temperature over the last 150 years. That timescale is nothing compared to the millions of years it usually takes for a +2 degrees change in climate.
We also know exactly how CO2, Methane and other gasses cause our planet to heat up. That mechanism has been a proven fact for many many decades now and it’s easily verifiable.

Today’s humans (homo sapien) have existed for about 200000 years, about 10000 years of that we started to settle down in towns and villages. All that time, changes in climate were slow and not intense. Only 200-150 years ago we started to produce climate gas on a big scale and suddenly, temperatures explode. What is happening right now is clearly not a natural cycle. It is entirely caused by human action.

Signal is based in America but it’s a non profit organization, not a company. Important difference