Health
Household Air Pollution Linked to 3.1 Million Deaths Annually, Study Finds
A new study published in The Lancet has revealed that household air pollution continues to be a major global health threat, contributing to 3.1 million deaths worldwide in 2021. Despite an overall decline in exposure levels, nearly one in three people globally were still affected by indoor air pollution, particularly in lower-income countries.
Health Impacts of Household Air Pollution
Household air pollution is primarily caused by cooking with open fires or stoves that burn kerosene, coal, wood, crop waste, or animal dung. These fuels release fine particulate matter that can enter the bloodstream through the lungs, leading to severe health issues. Researchers found links between household air pollution and various conditions, including lung cancer, stroke, heart disease, type 2 diabetes, chronic obstructive pulmonary disease (COPD), respiratory infections, cataracts, and neonatal disorders.
The study, conducted by the Institute for Health Metrics and Evaluation (IHME), highlighted the alarming impact on children. In 2021, household air pollution was associated with more than 500,000 deaths among children under five, accounting for approximately 11 percent of global under-5 mortality rates.
“The high level of pediatric burden estimated in this study is a major cause for concern,” the researchers stated, emphasizing that the issue has not received sufficient attention from policymakers and researchers.
Regional Disparities in Exposure and Mortality
Between 1990 and 2021, the percentage of people exposed to household air pollution from solid cooking fuels dropped significantly from 56.7 percent to 33.8 percent. However, due to population growth in certain regions, the absolute number of people exposed only fell by about 10 percent, meaning 2.67 billion people still faced dangerous pollution levels in 2021.
Sub-Saharan Africa had the highest exposure rate, with 78.8 percent of its population affected. The number of pollution-related deaths in the region also increased from 685,000 in 1990 to 741,000 in 2021. South Asia recorded the second-highest exposure rate at 53.2 percent. By contrast, central and eastern Europe and central Asia had significantly lower exposure levels at 7.5 percent, while high-income countries reported only 0.4 percent of their populations affected.
Call for Action: Transition to Cleaner Energy
Researchers stress the urgent need to help under-resourced communities transition to cleaner energy sources to mitigate the health risks of household air pollution. Proposed measures include investing in new technologies, subsidizing clean energy appliances, enforcing emissions restrictions, encouraging private sector investment, and launching public awareness campaigns.
“Such initiatives are crucial for mitigating health risks and promoting sustainable development, ultimately improving the quality of life and health outcomes for millions of people,” the study authors emphasized.
The findings highlight the continued urgency of addressing indoor air pollution, particularly in regions where reliance on solid fuels remains high. Governments and international organizations are being urged to accelerate efforts to provide clean energy solutions to vulnerable populations.
Health
Global Mental Health Cases Near 1.2 Billion as Anxiety and Depression Drive Sharp Worldwide Rise
A major global analysis has found that mental health conditions have surged to an estimated 1.2 billion people worldwide, driven largely by steep increases in anxiety and depression over the past three decades.
The findings, published in The Lancet as part of the Global Burden of Disease Study 2023, show that the number of people living with mental disorders has almost doubled since 1990, marking a 95% rise. Researchers say major depressive disorder and anxiety disorders have seen even sharper growth, increasing by 131% and 158% respectively, making them the most prevalent mental health conditions globally.
The report describes mental illnesses as widespread conditions that create long-term disability and significant human suffering. It also highlights broader consequences for economies and public services, including reduced productivity, lower workforce participation and increasing pressure on health and welfare systems.
Researchers estimate that in 2023 alone, around 620 million females and 552 million males were affected by mental health conditions. While the overall burden is rising across both sexes, the study points to notable differences in the types and prevalence of disorders.
Among women, depression and anxiety were the most commonly reported conditions, alongside higher rates of eating disorders such as anorexia nervosa and bulimia nervosa. The report links this disparity to a mix of biological, social and structural factors, including exposure to domestic violence, sexual abuse, gender inequality and reproductive health-related changes.
In contrast, neurodevelopmental and behavioural disorders, including attention deficit hyperactivity disorder (ADHD), conduct disorder and autism spectrum conditions, were more frequently diagnosed in men.
Teenagers aged 15 to 19 were identified as the group experiencing the highest mental health burden globally, raising concerns about early onset of conditions and insufficient preventive care for young people.
The study identifies several key risk factors associated with mental illness, including childhood sexual violence, bullying and intimate partner violence. These factors are strongly linked to conditions such as depression, schizophrenia, bipolar disorder and anxiety disorders. However, researchers note that such exposures have remained relatively stable over time and account for only a portion of the overall rise.
According to the authors, broader drivers are likely contributing to the increasing prevalence of mental disorders. These include genetic and biological influences, poverty, inequality, and the growing impact of global crises such as armed conflict, pandemics, natural disasters and climate-related stress.
While mental health conditions have long been a leading cause of disability worldwide, the report warns that the situation is worsening. At the same time, health systems have not expanded services at a pace matching demand.
The authors caution that the gap between rising need and limited access to care is becoming more pronounced, leaving millions without adequate treatment or support.
Health
Europe Records Sharp Rise in Sexually Transmitted Infections, ECDC Warns
Health
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