Ecological Footprint
One hectare is how many acres
What is 2.5 acres?
Name a benefit of crop rotation
Decrease success of pests / diseases
Maintain soil nutrient profile
Name a benefit of aquaculture
Requires only small amount of water, space, & fuel
Reduces risk of fishery collapse
Produces large amounts of protein/nutrients year-round
Doesn’t take up any land space
Irrigation accounts for this percent of all freshwater use
What is 70%?
This greenhouse gas, released in large amounts by cattle during digestion, has a warming potential far greater than CO₂.
What is methane?
This change in biodiversity indicates the environment is being used sustainably
Increased biodiversity
What is intercropping
2 plants grown next to each other that have a synergistic effect (they benefit each other)
The process of replanting forests is called this
What is reforestation
Benefits:
- Conservation of water
- Minimizes soil salinization
Drawbacks:
- Cost, in both money and labor
Producing one kilogram of beef requires far more of this resource than producing one kilogram of grain, making meat production especially resource-intensive.
What is water?
Define sustainability regarding resource use
Consuming a resource in a way that doesn’t deplete/degrade it for future generations
Introducing a natural predator to a pest is called this
What is biocontrol?
Name a drawback of aquaculture
High-density → high conc. of waste (N, P, e. coli, antibiotics, & eutrophication risk)
Increased disease risk
Introduction of non-native species
Waterlogging, leading to roots being starved of oxygen, is caused by this method of irrigation
What is flood irrigation?
Name a benefit of a prescribed burn
Small, controlled fires burn lots of dead biomass
Promotes nutrient recycling
This change in atmospheric temperature and CO2 concentration indicates the environment is not being used sustainably
What is an increase
Name a sustainable agriculture method that decreases soil erosion
Contour plowing
Windbreaks
No-Till agriculture
The world loses a soccer field size area of tropical rainforest every ___ seconds
What is 6
This process causes a buildup of minerals toxic to plant growth in soil over time
What is salt salinization?
This environmental impact of meat production occurs when forests are cleared to create pastureland or to grow feed crops like soy.
What is deforestation?
While carbon footprint is measured in tons of CO2, ecological footprint is measured in this
Hectares of land
This type of crop does not need to be replanted every year
What are Perennial Crops?
Name a negative effect of natural fire suppresion
Leads to more biomass buildup (larger/ even-aged/density)
Fire in-tolerant species
This aquifer, found in the Great Plains of the US, is being depleted due to agricultural overuse
What is the Ogallala Aquifer?
This type of farming system concentrates thousands of animals in small areas, increasing risks of water pollution from manure runoff.
What are CAFOs (Concentrated Animal Feeding Operations)