David Friedberg: Is This Pesticide Causing a Colon Cancer Spike in Young People?
Colon cancer incidence in individuals under 50 has surged by over 80% in the last two decades, diverging sharply from historical age-related patterns. New research links this spike to piclorum, a persistent herbicide that remains in groundwater for over a year and alters the epigenome to trigger cellular malfunction. A nationwide analysis of data from the Pesticide National Synthesis Project reveals a direct correlation between high piclorum usage in specific counties and elevated colon cancer rates. The study highlights that the last EPA safety assessment for this chemical dates back to 1995, prior to modern epigenomic capabilities.
Freshwater use and conservation | Middle school Earth and space science | Khan Academy
Only 2.5% of Earth's water is fresh, yet 70% of this limited resource supports agriculture while 22% serves industrial needs. Despite the total volume of fresh water remaining constant, rapid population growth since the 1950s has intensified demand and depleted accessible supplies faster than natural replenishment. Agricultural runoff and climate change further degrade water quality through harmful algal blooms and pollution, rendering existing sources unsafe for consumption. Desalination offers a technical solution but remains prohibitively expensive and energy-intensive for widespread adoption, necessitating immediate conservation strategies across domestic and commercial sectors.