light {I might add: many have photosensitivity, and may also have visual auras, some of which could be (light-provoked) auras}
sound
odors
complex sensory environments
One hypothesis is that years of repeated multisensory exposure could influence central sensory processing in susceptible individuals. This remains speculative for disease onset. (Source: ChatGPT)
Odor exposure
Industrial sources may emit odors from:
chemical use
wastewater treatment
(petroleum refining and food processing)
diesel powered equipment
Systematic reviews of industrial odor exposure report associations with symptoms including headache, nausea, and stress, although odor itself is difficult to separate from coexisting environmental factors. (Source: ChatGPT with edits; National Library of Medicine/PubMed Central)
5. Industrial odour pollution and human health; a systematic review and meta-analysis
Results:
"Thirty studies were eligible for this review, mainly cross-sectional (n = 23). Only one study involved school-age children and two studies involved workers. Only five studies reported odour effects on objective laboratory or clinical outcomes. Animal Feeding Operations and waste were the most common industrial sources."
“The overall odds ratios in exposed versus not exposed population were 1.15 (95% CI 1.01 to 1.29) for headache (7 studies), 1.09 (95% CI 0.88 to 1.30) for nausea/vomiting (7 studies), and 1.27 (95% CI 1.10 to 1.44) for cough/phlegm (5 studies). Heterogeneity was a moderate concern. Overall, the body of evidence was affected by a definitely high risk of bias in exposure and outcome assessment since most studies used self-reported information.”
Conclusions:
“Findings underline the public health importance of odour pollution for population living nearby industrial odour sources. The limited evidence for most outcomes supports the need