Overpopulation’s central role in environmental degradation is intermittently challenged. This article assesses the impact of mounting demographic pressures on six critical global sustainability challenges: deforestation, climate change, biodiversity loss, fishery depletion, water scarcity, and soil degradation. By synthesizing findings from hundreds of peer-reviewed studies, the article offers a comprehensive review of the effects of expanding human populations on the most pressing current environmental problems. Although the rate of population growth worldwide is slowing, human numbers are expected to continue increasing on Earth until the end of the century. Current research confirms that overpopulation causes substantial and potentially irreversible environmental impacts that cannot be ignored if international sustainability policy is to be effective.

This study considers ways to increase the consumption of sustainable fashion given the significant environmental and social damages associated with the industry. A series of experiments were conducted examining the impacts of choice architecture (nudges) under field conditions in collaboration with one of Israel’s largest shopping centers. This study sought to identify which interventions at the retail level successfully motivate sustainable fashion behavioral change regarding purchases and willingness to pay more, along with agreement with several statements regarding the climate crisis and sustainable fashion. Among the types of nudges examined in this field study were providing information, increasing accessibility to sustainable alternatives and appealing to social identity in relation to demographics and green self-image. This study found that offering alternatives to consumers constituted the most effective way to “nudge” consumers toward more sustainable purchasing behavior. Nonetheless, this does not negate the contribution of providing information and strengthening social norms regarding sustainable fashion. Additionally, in all groups, most participants reported that they did not know how to distinguish between sustainable and non-sustainable fashion, nor did they believe that the clothes they purchased were actually sustainable. The findings emphasize the need for policies that will increase the accessibility of sustainable fashion.

Climate change is intensifying droughts and threatening water security worldwide, particularly in arid and semi-arid regions. Israel’s innovative response has been to integrate large-scale desalination into its water supply and climate resilience strategy, recently constructing the Reverse Water Carrier, a pioneering project that conveys desalinated seawater from the Mediterranean inland to Lake Kinneret (Sea of Galilee). This study examines the objectives, rationale, and feasibility of this system as a model for climate-resilient water management. Using a qualitative case study approach, it evaluates the project across four dimensions: water security, environmental sustainability, economic feasibility and regional cooperation. Data were drawn from policy documents, expert interviews, and government reports. The analysis finds that replenishing the Kinneret with surplus desalinated water enhances national water reliability, reduces salinity, stabilizes agricultural production, and provides a critical emergency reserve, while introducing manageable energy and ecological trade-offs. Although long-term sustainability will depend on continued efficiency improvements and adaptive management, Israel’s experience demonstrates how inter-basin desalination transfers can strengthen water security and offer a replicable framework for other regions confronting climate-induced scarcity.

We discuss the impact of democratic political governance systems on ecological and conservation research, education, and practice, focusing on radical proposed changes to the judicial system in Israel. This judicial reform has already begun to restrict academic freedom and environmental laws, adversely affecting regulatory actions. We are concerned about the weakening enforcement of environmental laws, increased power to polluting industries, future defunding of ecological research and nature conservation programs, reduced cross‐border collaborations in ecological research, and restrictions on the academic teaching of ecology and evolution. Concerns related to Israel's unique biodiversity are particularly pressing in light of the constant threats from a rapidly growing population, high development pressures, and frequent military actions. International experience suggests that weakening judicial oversight of government actions in other countries is generating similar threats on a global scale. Therefore, ecologists and conservation biologists should actively be involved in the protection of liberal democracies and judicial independence.

This study considers ways to increase the consumption of sustainable fashion, given the significant environmental and social damages, associated with the industry. A series of experiments were conducted examining the impacts of choice architecture (nudges) under field conditions in collab-oration with one of Israel’s largest shopping centers. The study sought to identify which inter-ventions at the retail level successfully motivate sustainable fashion behavioral change regarding purchases and willingness to pay more, along with agreement with several statements regarding the climate crisis and sustainable fashion. Among the types of nudges examined in this field study were providing information, increasing accessibility to sustainable alternatives and appealing to social identity, in relation to demographics and green self-image. The study found that offering alterna-tives to consumers constitutes the most effective way to “nudge” consumers toward more sus-tainable purchasing behavior. Nonetheless, this does not negate the contribution of providing in-formation and strengthening social norms regarding sustainable fashion. Additionally in all groups, most participants reported that they do not know how to distinguish between sustainable and non-sustainable fashion, nor do they believe that the clothes they purchased were actually sustainable. The findings emphasize the need for policies that will increase the accessibility of sustainable fashion.