July 11th marks World Population Day, a time when organizations and groups focus on various population issues. This year, the spotlight is on climate change, resource scarcity, and shifting demographics. We’re highlighting five recently published Frontiers articles that explore how shrinking populations, human movement, and the health of certain demographic groups impact our warming planet.

Labor Shortages Could Slow Down Climate Change Countermeasures

Croatia is warming faster than the global average and ranks among the least climate-resilient high-income countries. A scientist there conducted analyses to pinpoint economic sectors that could support climate-resilient development by reducing emissions. The study found that key sectors with high potential for emission reduction, such as tourism, construction, and healthcare, are all facing significant labor shortages. This demographic decline could undermine Croatia’s ability to implement climate measures or delay counter-efforts. To address these shortages, the country is increasingly relying on migrant labor, as its own workforce continues to shrink and innovation levels remain low. These findings suggest that a decreasing workforce is a major hurdle in efforts to slow down climate change, emphasizing that easing socio-economic constraints is essential for successful climate-resilient development.

How Displacement Worsens Gender Inequality and Impacts Food Access

More than 120 million people worldwide are affected by displacement due to armed conflict, human rights violations, and natural or human-made disasters. While all displaced persons face precarious situations, women are disproportionately impacted. Recent research highlighted how displacement in Mozambique intensifies inequalities for women, affecting their access to food resources and their livelihoods. The study found that in displacement settings, women are particularly vulnerable to inequalities in food production labor, higher incidences of gender-based violence, and significant food insecurity. Despite their active role in displacement settlement food systems, ongoing socio-cultural and structural factors, like informal labor, severely limit women’s ability to profit from their work and build resilience. These factors also prevent them from accessing vital social protection mechanisms like childcare and reproductive health support.

Urbanization Without Relocation Can Lead to Healthier Lives

When people begin living in more urbanized areas without physically moving, it’s known as in-situ urbanization. This term describes the transformation of rural regions into urban ones with minimal or no migration. Researchers in China investigated how in-situ urbanization affects the health of people in these newly urbanized areas. Their findings revealed positive effects on individual health, with women and people under 60 experiencing greater health improvements than men and older individuals. The primary mechanism identified was higher incomes: as household incomes rose by nearly 20% and businesses became more profitable, in-situ urbanization contributed to better individual health.

Prioritizing Women’s Health Is Key for Healthy Births on a Warming Planet

The climate crisis, with its effects like water scarcity, malnutrition, environmental pollution exposure, and extreme weather events, poses a major threat to human health. Pregnant individuals, already facing increased physiological demands, are even more vulnerable to these stressors. A comprehensive literature review examined the challenges climate change presents for pregnant people that directly or indirectly impact maternal and fetal health, and it also outlined mitigation strategies. Highlighting the dangers of climate change-induced risks to women, the authors advocate for a women-centered approach to healthcare. To meet pregnant women’s needs, inclusive and personalized healthcare is crucial and should be prioritized throughout women’s lifespans. On a policy level, sexual and reproductive health and human rights should be integrated into climate policies to improve the well-being and health of women globally.

Bad Air Quality Could Prompt People to Relocate

It’s well-known that air pollution negatively affects our health, with older people being particularly susceptible to poor air quality. But how does living in a polluted region influence the decision to move? Researchers analyzed how air pollution impacts relocation decisions, specifically focusing on older adults. Their results showed that older people’s decisions to move are influenced by various factors, including dissatisfaction with air quality, which acts as a “push factor” predicting relocation willingness in heavily polluted cities. The study also revealed that both urban characteristics and individual attributes contribute to older adults’ perceptions of health risks, which in turn inform their relocation considerations. Measures such as subsidized relocation programs and health literacy initiatives are needed to protect older adults.