My sketch is focused on the current state of the world and our combined rate of consumption of fossil fuels (oil, natural gas and coal) that has significantly contributed to the otherwise natural and non-toxic CO2 gas in our atmosphere. However, the increase in the concentration of the CO2 gas has caused an issue by forming a "blanket" in our atmosphere and not allowing the solar energy to reflect back into space, as it would otherwise do.

Solar energy is "free" energy and having that knowledge available to us is key because the world's fossil fuel energy resources (known to currently exist) are exponentially be consumed at a rate that can not be replenished. In other words, yes... fossil fuels can and will be replenished... but not within a time frame of one or two generations. Rather, the estimated timeframe is in millions of years and humanity's continued existence is not capable of any lapse or loss of fossil fuel source. And even if we were capable, the global warming and contamination resulting from fossil fuel sources is going to kill us anyway.

That is why I decided depict the social demise of humanity by sketching a draft of a vision of how the world may look with fossil fuel contaminants and how such pollutants are working both against our health, but also against us if we were to substantially use a less volatile fuel source of the sun's energy via use of photovoltaic panels.

Within the sketch I depict pollution, obscurity of the sun's ability to reach earth (due to atmospheric contaminants, aka: smog), a revert back to a lifestyle before fossil fuels became so popular, the inability to grow crops for the lack of sunlight for photosynthesis, deforestation, and perhaps the most unforgivable issue of technology brought us to this crux and now we are stuck with it!

Think something along the line of "Planet of the Apes"... if your having trouble with my rationale for the sketch, but with 10^15 times as much pollution as we have now.

Resources:
Energy, Environment and Climate- R. Wolfson 2nd edition ( 2012) published by W.W. Norton & Co.

"Planet of the Apes"- Pierre Boulle, (1963) published by René Julliard

movie trailer https://www.youtube.com/watch?v=VjcpRHuPjOI