The slope isn't exaggerated - it shows a linear trend, and it choses the only reasonable limits in order to illustrate this in the period. Starting the graph at zero would make no sense - you could easily illustrate the stability of global temperature by showing a graph of average temperatures starting at zero Kelvin.

What is true is that atmospheric CO2 is hard for most of us to interpret substantially. However, the graph is not setting out to effectively illustrate how much CO2 there is in the atmosphere, but rather the linear growth of atmospheric CO2 levels in spite of various efforts.

If the Y axis was secretly log transformed or something like that, there would be reason to worry. But it's linear, and the story told by the graph is accurate.

The instinct of checking the limits of the Y axis is a good one though.

The slope isn't exaggerated at all, the increments are same as if you showed the full graph from zero. But zero isn't a useful baseline, and zooming out to fit it into your screen would give a false impression of a flat change at the top of a narrow section of history. What would fix that is a longer x-axis showing further back in time. Then you'd see a relatively flat line with some rises and dips, then at the end a sudden spike.

Here's a chart at the beginning of the global average surface temps, so you can compare from 1960 and see a similar trend. Lower down you can also find the IPCC projected paths and see the same. RCP8.5 was considered no action and business as usual...more or less where we still are.

It's because most people just want to live their lives in peace, even if they're under a boot. That has always been true.

People are dumber with higher CO2 concentrations. No joke bring a brilliant person and they will struggle. This is why we need good ventilation in classrooms because it can get stuffy(low O2 and high CO2)

What is the co2 ppm in a stuffy office I wonder.

This, more co2 is better for plants, it makes us more miserable