Ah! What's happening?
When fertile soil becomes dust and dirt due to overgrazing, deforestation, climate change, etc
Desertification
Turning the soil between every harvest
What is the 1st step of the wastewater treatment system?
Filtration: Water is passed through a large screen to remove solid objects
Explain eutrophication
excess nutrients, such as nitrogen and phosphorus, flow into bodies of water
What is acid rain?
Rain, snow or fog that is more acidic than normal
What can happen due to uncontrolled population growth?
Depletion of resources
habitat loss
increased pollution
Describe No-till Farming
Leaving the soil alone between crops to leave behind nutrients
What are the benefits of CAFOs?
Cheap for the consumer
Makes more money for the farmer
Highly efficient
Explain dead zones
areas where oxygen levels in the water drop too low to support most marine life
How are VOCs (Volatile Organic Compounds) emitted into the air?
products like paints, cleaning supplies, cars, and tobacco smoke
How can a population’s growth be limited or decreased?
Pandemic/Disease Outbreak
competition for resources
natural disasters
Growing 1 crop at a time
Monoculture
What are the risks of CAFOs?
Pollution from animal waste
Overuse of antibiotics causes resistance
Increased greenhouse gas emissions
Explain Point Source Pollution
Pollution that can be traced to 1 specific source
What is Particulate Matter?
Tiny solid or liquid particles suspended in the air
What stage of DTM is this explaining?
The introduction of modern medicine & vaccines
Stage 2 Healthcare
What is the purpose of irrigation?
To artificially supply water to crops during dry periods
Chlorine is added to the water to disinfect it before it is released into a stream, lake or ocean
Chlorination (Last step in wastewater treatment)
How does ocean acidification affect the food chain?
Excess CO2 makes it harder for marine organisms to have strong shells and disrupts food chains from the bottom up
What is a big health concern about Particulate Matter air pollution?
Penetrate and damage lungs
Describe the birth rates and death rates on Stage 2 DTM
BR-High but lowering
DR-Decreasing
The overuse of them makes bugs more resistant and harder to kill
What is unique about the Aeration Tank step in wastewater treatment?
Bacteria uses oxygen to feed on the waste and treat the water
Explain Non Point source pollution
Pollution that cannot be traced and can come from multiple sources
How is Particulate matter emitted into the air?
Diesel fumes, sulfur dioxide, ash, factory emissions, construction debris