Yahoo Suche Web Suche

Suchergebnisse

  1. Suchergebnisse:
  1. 18. Jan. 2022 · The novel entities boundary in the planetary boundaries framework refers to entities that are novel in a geological sense and that could have large-scale impacts that threaten the integrity of Earth system processes. We review the scientific literature relevant to quantifying the boundary for novel entities and highlight plastic ...

    • ACS Full Text

      Chemicals, while bringing benefits to society, may be...

    • Aqueous Iron

      High-valent iron(IV)–oxo complexes are of great significance...

  2. 13. Sept. 2023 · The introduction of novel entities is a new anthropogenic driver of Earth system change that, if sufficiently transgressed, could, on its own, alter Earth system state. However, this planetary boundary acts largely through perturbation of the core boundaries, especially biosphere integrity.

  3. 13. Sept. 2023 · The novel entities boundary has now been quantified, and the assessment confirms that it is transgressed. It includes the introduction and accumulation of all novel chemical compounds created by humans, such as microplastics, pesticides and nuclear waste.

    • Better Living Through Modern Chemistry
    • Novel Entities Are Persistent in The Environment
    • Non-Stick Chemicals Stick Around
    • Whole-Body Disruption
    • What Goes Around, Comes Around
    • The Brain Is Defenseless Against Nanoscale Pollutants
    • The Status of The Novel Entity Planetary Boundary
    • The Precautionary Principle
    • Time For Industry to Pay Its Share

    For 20 years, dichlorodiphenyltrichloroethane was the wonder child of modern chemistry. DDT’s insect-killing action during World War II slowed the spread of diseases like malaria and typhus, saving untold numbers of lives. Later, it became popular as an agricultural pesticide. But Rachel Carson’s seminal book, Silent Spring, documented and drew att...

    Humans have invented more than 140,000 synthetic chemicals, adding another 2,000 or so each year. We also produce vast quantities: around 2.3 billion tonsannually. Yet, only a few thousand have ever been tested for their toxicity to humans or other organisms. And very few are tracked along their supply chains from source to disposal. The Planetary ...

    One of the earliest PFAS chemicals to be discovered and marketed was perfluorooctanoic acid (PFOA), known in the industry as C-8. It was used at the DuPont Teflon plant to manufacture non-stick pans, and despite evidence of its devastating effects on the human body — heart disease, ulcerative colitis, thyroid disease, testicular cancer, kidney canc...

    PCBs and PFAS can attack organs throughout the human body because they are endocrine-disrupting chemicals (EDCs), meaning they mimic or interfere with hormones, which regulate every major body system. In fact, EDCs have been linked to some of the biggest non-communicable health epidemics of the 21st century, including obesity, endometriosis, heart ...

    Plastics are a novel entity in their own right: Ubiquitous, mobile, and exceptionally slow to degrade, plastics may be the fastest-growing threat to Earth systems. “Plastics are second only to climate change with regard to [the threat to] our ability as a species to survive on this planet,” said Sherri Mason, professor of chemistry at Penn State Un...

    An emerging area of novel entities research concerns nanoparticles. These tiny particles, each less than a thousandth the width of a human hair, are generated by a wide variety of processes, both natural and fabricated, including forest fires and wood-burning stoves, road traffic pollution, and many high-temperature industrial processes. Once inhal...

    The sheer volume and variety of environmental pollutants is why this planetary boundary remains one of two whose risks are wholly unquantified (the other being atmospheric aerosol pollution). But scientists have reason to suspect we may already be in the novel entity danger zone: A 2017 analysisfound that the production and diversification of synth...

    Experts interviewed for this story agreed that the best way for regulators to deal with the tidal wave of novel entities is to heed the precautionary principle, which states that new innovations should only be released into the market afterthey’ve been proven safe. The EU Registration, Evaluation, Authorisation and Restriction of Chemicals(REACH) r...

    The chemical industry’s astronomical success and profits have been built upon the externalization of many of its costs. “Until you make [chemical producers pay] the real [environmental and human] cost, it’s really the public paying for everything, and they’re paying for it through health care,” disposal and cleanup, said Beeler. In 2019, the WHO es...

  4. 18. Jan. 2022 · Story highlights. First assessment published of planetary boundary related to “novel entities” (synthetic chemicals including plastics) Researchers conclude planetary boundary has now been exceeded, raising the risks to the stability of the Earth system.

  5. Anthropogenic introduction of novel entities to the environment is of concern at the global level when these entities exhibit (i) persistence, (ii) mobility across scales with consequent widespread distributions, and (iii) potential impacts on vital Earth-system processes or subsystems.

  6. 2. Aug. 2022 · The novel entities boundary in the planetary boundaries framework refers to entities that are novel in a geol. sense and that could have large-scale impacts that threaten the integrity of Earth system processes. We review the scientific literature relevant to quantifying the boundary for novel entities and highlight plastic pollution ...