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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.02%3A_Cycles_of_Matter_in_the_Biosphere/17.2I%3A_OzoneThis page discusses the dual challenges of ozone (O3): its harmful excess in the troposphere, causing smog and health issues, and its depletion in the stratosphere, resulting in the ozone hole, partic...This page discusses the dual challenges of ozone (O3): its harmful excess in the troposphere, causing smog and health issues, and its depletion in the stratosphere, resulting in the ozone hole, particularly over Antarctica. This depletion, mainly due to chlorofluorocarbons (CFCs), increases UV radiation risks. However, international efforts, notably the Montreal Protocol, have reduced CFC usage and shown recovery signs in mid-latitude ozone levels, although the Antarctic hole remains an issue.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.01%3A_Energy_Flow_through_the_Biosphere/17.1F%3A_Biomagnification_of_PesticidesThis page discusses how DDT accumulates in organisms through biomagnification across four trophic levels, resulting in higher toxin concentrations in top-level consumers such as ospreys and eagles. Th...This page discusses how DDT accumulates in organisms through biomagnification across four trophic levels, resulting in higher toxin concentrations in top-level consumers such as ospreys and eagles. The slow metabolism and excretion of DDT lead to severe ecological consequences, including population declines in affected carnivores, as trace amounts in primary producers like plankton become exponentially concentrated as they ascend the food chain.
- https://bio.libretexts.org/Bookshelves/Biochemistry/Fundamentals_of_Biochemistry_(Jakubowski_and_Flatt)/Unit_IV_-_Special_Topics/32%3A_Biochemistry_and_Climate_Change/32.13%3A_Biochemistry_Climate_Change_and_Human_HealthThe page discusses the biochemical impacts of climate change on human health, focusing on various areas like heat stress, infectious diseases, and air quality. It outlines learning goals for biochemis...The page discusses the biochemical impacts of climate change on human health, focusing on various areas like heat stress, infectious diseases, and air quality. It outlines learning goals for biochemistry majors, emphasizing the importance of understanding how rising temperatures and environmental shifts alter biochemical processes, influence disease dynamics, and affect nutrient quality.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.02%3A_Cycles_of_Matter_in_the_Biosphere/17.2E%3A_Sewage_TreatmentThis page discusses the U.S. waste management system, where 60% of waste is collected by sewers using 14 billion gallons of water daily, with 10% untreated discharge. It explains Biochemical Oxygen De...This page discusses the U.S. waste management system, where 60% of waste is collected by sewers using 14 billion gallons of water daily, with 10% untreated discharge. It explains Biochemical Oxygen Demand (BOD) related to organic matter, emphasizing the importance of keeping BOD below 1 for drinking water. The sewage treatment process includes primary, secondary, and optional tertiary treatments to reduce BOD and nutrients.
- https://bio.libretexts.org/Courses/Evergreen_Valley_College/Introduction_to_Ecology_(Kappus)/13%3A_Threats_to_BiodiversityThe core threat to biodiversity on the planet is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and ...The core threat to biodiversity on the planet is the combination of human population growth and the resources used by that population. The human population requires resources to survive and grow, and many of those resources are being removed unsustainably from the environment. The five main threats to biodiversity are habitat loss, pollution, overexploitation, invasive species, and climate change. Increased mobility and trade has resulted in the introduction of invasive species while the other t
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.02%3A_Cycles_of_Matter_in_the_Biosphere/17.2H%3A_Acid_RainThis page discusses the increasing acidity of rain in North America and Europe, primarily caused by industrial sulfur dioxide emissions, with pH levels dropping to 2.1. This acid rain poses risks to b...This page discusses the increasing acidity of rain in North America and Europe, primarily caused by industrial sulfur dioxide emissions, with pH levels dropping to 2.1. This acid rain poses risks to buildings, aquatic ecosystems, and forests, especially in sensitive regions like the Adirondacks. Although sulfur dioxide emissions have declined since the 1980s, nitrogen oxides and ozone from vehicle exhaust continue to be concerns.
