Wednesday, September 7, 2011
Sunday, September 4, 2011
Key concept chapter two
"Systems have inputs, flows, and outputs of matter and energy, and feedback can affect their behavior."
This concept describes the way that components in a environment work together to make a system. The inputs in the environment work together to make an output that either benefits or hurts the environment.
This concept is interesting because of the way that the system is able to change when the feedback they receive changes.
A diagram is used to illustrate the way a feed-back loop works. The diagram starts with the input and then shows the way that the throughputs can change the output into something negative or positive.
It's interesting how the diagram can change from something negative to positive.
This concept describes the way that components in a environment work together to make a system. The inputs in the environment work together to make an output that either benefits or hurts the environment.
This concept is interesting because of the way that the system is able to change when the feedback they receive changes.
A diagram is used to illustrate the way a feed-back loop works. The diagram starts with the input and then shows the way that the throughputs can change the output into something negative or positive.
It's interesting how the diagram can change from something negative to positive.
Saturday, September 3, 2011
Key Concepts of Chapter one
"As our ecological footprints grow, we are depleting and degrading more of the earth's natural capital."
This concept describes the way humans are effecting the earth's sustainability by wasting the earth's natural resources. As peoples' ecological footprints continue to grow, the earth's natural capital depreciates.
The key concept is interesting because it shows the different ways of life and culture that humans have and how that effects their ecological footprint.
"the U.S. per capita ecological footprint was about 4.5 times the average global footprint, and 12 times the average per capita footprint, and 12 times the average per capita footprint of the world's low-income countries."
This data points describes the vast difference between the global footprint of an American and a citizen of a poor country. This is an interesting data point because if every citizen lived as Americans do, the world would not be able to provide enough resources for people to survive.
This concept describes the way humans are effecting the earth's sustainability by wasting the earth's natural resources. As peoples' ecological footprints continue to grow, the earth's natural capital depreciates.
The key concept is interesting because it shows the different ways of life and culture that humans have and how that effects their ecological footprint.
"the U.S. per capita ecological footprint was about 4.5 times the average global footprint, and 12 times the average per capita footprint, and 12 times the average per capita footprint of the world's low-income countries."
This data points describes the vast difference between the global footprint of an American and a citizen of a poor country. This is an interesting data point because if every citizen lived as Americans do, the world would not be able to provide enough resources for people to survive.
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