If improving your outlook on life were truly as effortless as merely saying, “Don’t worry, be happy,” then maintaining high spirits would be straightforward. Unfortunately, reality proves more complex, as numerous factors beyond our influence can impact our mood.
In a groundbreaking study published in March in the esteemed journal Environmental Research, researchers from Osaka University unveiled a significant revelation-pollutants in the environment can exert a profound influence on our emotional wellbeing throughout our lifespan.
A newly devised risk assessment tool defined happy life expectancy as the duration of a person’s life during which they experience subjective emotional wellbeing. Meanwhile, loss of happy life expectancy (LHpLE) was delineated as a reduction in positive emotional experiences in an individual’s life. LHpLE is determined by combining the decline in happiness and the rise in mortality linked with exposure to risks.
“We previously utilised the LHpLE measure to assess psychological distress and cancer risk following radiation exposure post the Fukushima Daiichi Nuclear Power Station accident, among other scenarios,” explains lead author Michio Murakami. “However, this tool has not been applied to evaluate the impact of cancer or exposure to environmental carcinogens on happiness.”
To address this crucial gap in knowledge, the researchers conducted a meticulous survey of Japanese individuals, aiming to ascertain their average happiness across different ages and genders. This comprehensive approach allowed them to establish whether cancer diminishes emotional happiness. Subsequently, LHpLE was computed for exposure to prevalent environmental cancer-causing agents in Japan, alongside psychological distress, facilitating a robust comparison of diverse forms of risk exposure.
“The outcomes were thought-provoking,” elucidates young author Shuhei Nomura. “We discovered that emotional happiness did not significantly decline among those with cancer, nor was there a notable correlation between emotional happiness and cancer type, history, or stage.”
Overall, exposure to environmental carcinogens reduced lifespan emotional happiness by 0.0064 years for radon, 0.0026 years for arsenic, and 0.00086 years for fine particulate matter in the air, attributable to heightened mortality. The dip in emotional happiness was even more conspicuous for psychological distress, resulting in an LHpLE decrease of 0.97 years.
“Our findings indicate that exposure to carcinogens and psychological distress substantially diminishes lifetime happiness,” underscores Murakami.
Given the stark decline in lifespan emotional happiness associated with carcinogens, the profound insights gleaned from this study advocate for a transformative shift in environmental policies. By focusing on minimising exposure to such substances, we can potentially enhance public health and help individuals lead longer, more contented lives.
More information: Michio Murakami et al, Comparing the risks of environmental carcinogenic chemicals in Japan using the loss of happy life expectancy indicator, Environmental Research. DOI: 10.1016/j.envres.2024.118637
Journal information: Environmental Research Provided by Osaka University
