Presentation on theme: "Threat 1: Ozone Depletion Description: The ozone layer protects us from ultraviolet (UV) radiation from the sun, but it is becoming thinner in places."— Presentation transcript:
Threat 1: Ozone Depletion Description: The ozone layer protects us from ultraviolet (UV) radiation from the sun, but it is becoming thinner in places. Causes: Air pollution such as chlorofluorocarbons (CFCs) from aerosol spray cans.
Threat 1: Ozone Depletion Effects: Increased UV radiation reaches Earth, causing sunburn, skin cancer, and damage to plants. Solutions: Eliminate the use of CFCs.
Threat 2: Global Warming Description: Earth’s climate is getting warmer. Causes: Pollution, mostly from CO 2 emissions from fossil fuels.
Threat 2: Global Warming Effects: Altered weather patterns, sea level rise from melting ice caps, plant and animal loss. Solutions: Use alternative energy sources (solar, wind, hydroelectric) instead of fossil fuels to decrease CO 2 emissions.
Threat 3: Habitat Loss Description: Habitats for organisms, such as the Amazon rainforest and coral reefs, are being destroyed by humans. Causes: Deforestation to create pastureland for cattle, urban development, pollution, global warming.
Threat 3: Habitat Loss Effects: Loss of biodiversity / extinction of species. Solutions: Sustainable use of resources, protecting land and species in national parks.
Threat 4: Acid Precipitation Description: Precipitation with unusually high amounts of acid. The pH is below 7. Causes: carbon dioxide, sulfur dioxide, etc. (from factory or car pollution) mixes with H 2 O to form acid rain.
Threat 4: Acid Precipitation Effects: Harms or kills plants and causes metal in bridges, cars, etc. to corrode quickly. Solutions: Filter harmful pollution from factories/cars and reduce the use of fossil fuels.
Threat 5: Invasive Species Description: Species not native to a particular area. (kudzu, zebra mussels, etc.) Causes: Humans carry them to a new area either ON PURPOSE (kudzu) or ACCIDENTALLY (zebra mussels.)
Threat 5: Invasive Species Effects: Harms or kills native species, decreases biodiversity, and negatively affects food webs. Solutions: Killing or otherwise eliminating the invasive species. Usually, this is difficult!
Threat 6: Bioaccumulation Description: The increasing concentration of harmful chemicals in the bodies of organism in a food web. Causes: Chemicals such as DDT & mercury are released in ecosystem and absorbed or eaten by plants/animals.
Threat 6: Bioaccumulation Effects: Death by poisoning, low birth rates due to birth defects or thin-shelled eggs, and behavioral changes. Solutions: Decrease the use of toxic chemicals in ecosystems.