About 288,000 results
Open links in new tab

  1. Blooms of algae or cyanobacteria can harm people, animals, or the environment if they:

    • Make toxins
    • Become too dense
    • Use up oxygen in the water
    • Release harmful gases

    Harmful Algal Blooms and Your Health | Harmful Algal Bloom (HA…

    www.cdc.gov/harmful-algal-blooms/about/index.html
    www.cdc.gov/harmful-algal-blooms/about/index.html
    Was this helpful?
  2. People also ask
    Are algae harmful?
    Algae are an important part of ecosystems in fresh waters, salt waters, and brackish (a mix of fresh and salt) waters. However, under the right conditions some types of algae can be harmful when they grow too quickly or make toxins. Ecosystems are made up of living things and their physical environment.

    Harmful Algal Blooms: Contributing Factors and Impacts

    cdc.gov
    What are the disadvantages of Alkaline water?

    Michael Colangelo

    Master of Science (M.S.) in Nutrition · 15 years of exp

    The primary disadvantage of alkaline water is cost. Currently, there are not enough proven advantages of drinking alkaline water to justify the cost. There is no well-established evidence that suggests drinking alkaline water will improve or negatively impact health. The acid/alkaline theory of health proposes we can balance the pH in our bodies by consuming alkaline foods and water. However, what we eat has very little effect on our blood pH because our bodies have mechanisms that tightly regulate our blood pH to keep us alive.
    +23 more answers
    bing.com
    Is algae a threat?
    In fact, scientists have found toxic algae in the air up to 10 miles away, indicating the threat may be even more widespread than previously thought. Common short-term signs of exposure range from headaches and skin irritation to fever and vomiting. These symptoms usually begin within a few hours and can last for several days.

    Harmful exposure: The risks and dangers of toxic algae blooms

    ewg.org
    What happens when algae dies?
    When the algae eventually dies, the oxygen in the water is consumed. The lack of oxygen makes it impossible for aquatic life to survive. The largest dead zone in the United States – about 6,500 square miles – is in the Gulf of Mexico and occurs every summer as a result of nutrient pollution from the Mississippi River Basin.

    The Effects: Dead Zones and Harmful Algal Blooms | US EPA

    epa.gov
    What types of algae can cause harmful algal blooms?
    Many different types of algae can cause harmful algal blooms. However, three types —cyanobacteria, dinoflagellates, and diatoms—cause most blooms that make people and animals sick. Cyanobacteria (blue-green algae) are the most common cause of harmful algal blooms in fresh water, such as lakes or rivers.

    Harmful Algal Blooms and Your Health | Harmful Algal Bloom (HAB

    cdc.gov
    What causes toxic algae blooms?
    Toxic algae blooms are caused when water is polluted by nitrogen and phosphorus, often from fertilizer and animal manure in farm runoff. To help prevent blooms from occurring, farmers need to implement conservation practices that prevent farm runoff from getting into bodies of water.

    Harmful exposure: The risks and dangers of toxic algae blooms

    ewg.org
    Feedback
  3. CDC
    https://www.cdc.gov › harmful-algal-blo…

    Harmful Algal Blooms and Your Health | Harmful Algal …

    Jan 9, 2024 · Learn how algae and cyanobacteria can grow out of control and produce toxins that harm people, animals, or the environment. Find out how to recognize, prevent, and treat harmful algal bloom-associated illnesses.

    Tags:
    Harmful Algal Blooms
    Bad
  4. National Oceanic and Atmospheric Administration
    https://www.noaa.gov › what-is-harmful-algal-bloom

    What is a harmful algal bloom? | National Oceanic and …

    Tags:
    Algal Bloom Definition
    Algal Bloom Effects On People
    Consequences of Algal Bloom
  6. USGS.gov
    https://www.usgs.gov › news › featured-story › algal...

    Algal blooms aren’t always harmful, but when they are, science is …

    Tags:
    Harmful Algal Blooms
    Science
  7. Izaak Walton League
    https://www.iwla.org › publications › out…

    Algal Blooms: The Causes, Dangers and Some Solutions

    On August 3, 2014, 400,000 people in Toledo, Ohio had no drinking water. Toxins produced by a massive algal bloom in Lake Erie had contaminated the city’s water supply. Bottled water became instantly more precious than gold. The …

    Tags:
    Dangers
    Algal bloom
  8. CDC
    https://www.cdc.gov › harmful-algal-blo…

    Harmful Algal Blooms: Contributing Factors and Impacts

    Apr 18, 2024 · Harmful algal blooms can hurt local ecosystems, including people, animals, and plants. Harmful algal blooms are more likely to grow in warm, slow-moving water with many nutrients. Help prevent harmful algal blooms from …

    Tags:
    Harmful Algal Blooms
    United States Centers for Disease Control and Prevention
  9. Science Mission Directorate
    https://science.nasa.gov › ... › earth-sci…

    The Good, the Bad, and the Algae - Science@NASA

    Jun 24, 2015 · Single-celled algae called phytoplankton are a main source of food for fish and other aquatic life, and account for half of the photosynthetic activity on Earth—that’s good. But certain varieties such as some cyanobacteria produce …

    Tags:
    Science
    NASA
  10. U.S. Environmental Protection Agency
    https://www.epa.gov › nutrientpollution …

    The Effects: Dead Zones and Harmful Algal Blooms | US …

    Jan 3, 2024 · Harmful algal blooms are mainly the result of a type of algae called cyanobacteria, also known as blue-green algae. Elevated nutrient levels and algal blooms can also cause problems in drinking water in communities …

    Tags:
    Harmful Algal Blooms
    United States Environmental Protection Agency
  11. National Institute of Environmental Health Sciences (NIEHS)
    https://www.niehs.nih.gov › health › top…

    Algal Blooms - National Institute of Environmental …

    Oct 24, 2024 · A harmful algal bloom (HAB) occurs when toxin-producing algae grow excessively in a body of water. The excessive algal growth, or algal bloom, becomes visible to the naked eye and can be green, blue-green, red, …

    Tags:
    Algae
    Algal bloom
  12. Environmental Working Group
    https://www.ewg.org › news-insights › n…

    Harmful exposure: The risks and dangers of toxic algae …

    Aug 23, 2022 · Exposure to toxic algae, which are actually cyanobacteria, can harm both humans and animals. Here’s what you should know about the potential hazards of toxic algae blooms. Common short-term symptoms. People …

    Tags:
    Algae
    Dangers
  13. NOAA's National Ocean Service
    https://oceanservice.noaa.gov › facts › why_habs.html

    Why do harmful algal blooms occur? - NOAA's National Ocean …

    Tags:
    Harmful Algal Blooms
    HABs