#Environment190
New method turns sewage sludge into renewable natural gas
A pilot study tested a pretreatment for sewage sludge that produced more renewable natural gas and cut disposal costs. The process uses heat, pressure and a newly found bacterium to make nearly pure methane and reduce waste.
Photo by Marcin Jozwiak, Unsplash
PFAS exposure weakens adults’ immune response
New research finds that PFAS chemicals in products and contaminated drinking water can reduce antibody production in adults, making the immune response to a new virus weaker. The study highlights risks for some groups and supports water regulation.
How AI and Automation Are Changing Land Use in Brazil
Research shows artificial intelligence, automation and digital tools are reshaping land use in Brazil. The study finds that the digitalised agribusiness model displaces communities, erases traditional knowledge and calls for transparency, justice and cooperative approaches.
Cleaning plastic can release harmful chemicals
A study from Iowa State University shows some common cleaning methods for recyclable plastic can release phthalates into wash water. Ultrasonic cleaning and detergent with sodium hydroxide released DEHP and DCHP, and reuse of water raised DEHP levels.
Guanacaste: water, tourism and development
Guanacaste is Costa Rica's driest province and attracts tourists and foreign buyers. Rapid coastal development has increased water shortages, pollution and local protests, while officials and studies warn aquifers and ageing water systems are under pressure.
Wastewater surveillance reveals antibiotic resistance across Indian cities
A study of sewage from four Indian cities found many antibiotic resistance genes and similar resistance patterns. The 2025 National Action Plan and experts promote wider wastewater surveillance, but critics warn of weak implementation.
Mining pressure threatens large areas of the Brazilian Amazon
A study warns that mining for minerals used in clean energy could threaten nearly 363,000 square kilometres of the Brazilian Legal Amazon. The area is mostly forest and is home to many indigenous people and quilombola communities.