Many graphs on this section will look very similar, like the beginning part of a roller coaster or a "hockey stick curve". While it may seem redundant to show a repeated graphical visualization of CO2 PPM, hottest years on record, or whatever environmental variable is being measured, it is integral to note the correlation between these factors and the implications of what all this research is telling us.
Even though the world's population growth rate has been declining since the 1970's and is projected to decrease to around +0.1% by the end of the 21st century, our global population has still exploded over the last 60 years. Population Dynamics explains how an exponential growth or "density-independent growth" rate (in the below chart, our rate is slowing down but still positive) has massive implications when multiplied billions of times. However, to attribute the changes in our climate solely to the raw numbers of humans on Earth would be partially missing the point, as the overwhelming majority of growth has occurred in the developing world. This fact in and of itself would not be a problem if the people of Earth were not using fossil fuels for their energy consumption. However, our increased reliance as a species on non-renewable energy after the industrial revolution has not only filled our atmosphere with a thicker layer of greenhouse gases, but also ensured that fossil fuel emissions will quicken the pace of climate change via a positive feedback loop and lengthen the amount of time that CO2 remains in our atmosphere.