Cartoon
Cartoon
chimney
A vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon or hydrocarbon based fuels); a flue.
– https://en.wiktionary.org/wiki/chimney

Source:
The original cartoon can be found on Durdecifer’s blog. I tried to initiate a conversation by leaving a comment but the comment never made it !
For further information:
1&4- Chimney vs. Cooling towers
chimney
A vertical tube or hollow column used to emit environmentally polluting gaseous and solid matter (including but not limited to by-products of burning carbon or hydrocarbon based fuels); a flue.
cooling tower
A large device, in the form of a tower-shaped building, in which warm water is cooled by evaporation caused by circulating currents of air

2- Ionizing radiation hazard sign
If a radiation hazard sign is needed near a power plant then we would be needing signs all around the planet (See 3-)
https://en.wikipedia.org/wiki/Hazard_symbol
3- Lethal dose
Based on the cartoon, death is associated to the doses coming from a nuclear power plant. However the annual dose near a nuclear power plant is lower than a chest x-ray. Fun game, find ‘Living near a nuclear power station’ below:

Source: https://www.epa.gov/radiation/radiation-sources-and-doses (from: National Council on Radiation Protection & Measurements (NCRP), Report , No. 160)
In fact it is so insignificant that it isn’t even considered to be a source of radiation exposure for the average dose:

Test sdfsf

