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According to Mathis Wackernagel, ecological overshoot is caused by an overuse of resources. Which of the following practices could contribute to ecological overshoot?
Switching to renewable energy sources with lower CO2 emissions
Recycling materials after they are used
Catching fish more rapidly than the population can sustain
Replanting trees as timber is harvested
Catching fish more rapidly than the population can sustain
If the world population was using only 50% of Earth's biocapacity in 1961, that would represent a global ecological footprint of:
2.0 planet Earths
1.0 planet Earths
5.0 planet Earths
0.5 planet Earths
0.5 planet Earths
One criticism of the ecological footprint methodology is that it ignores human population growth. If this criticism is correct, which of the following statements would also be true?
The ecological footprint is likely to overestimate the future natural capital needs of the planet.
The ecological footprint is likely to estimate the future natural capital needs of the planet correctly.
There is no cause for concern because human population growth is not correlated with the global ecological footprint.
The ecological footprint is likely to underestimate the future natural capital needs of the planet.
The ecological footprint is likely to underestimate the future natural capital needs of the planet.
A second criticism of the ecological footprint is the possibility that the current estimate of 25% global overshoot may be incorrect. If humans are in fact still below global biocapacity, that implies:
All our practices are sustainable.
It's already too late for change—our civilization is headed for collapse.
We can increase our natural resource use without cause for concern.
We may need to change some of our practices, but we have more time to make those adjustments.
We may need to change some of our practices, but we have more time to make those adjustments.
If Mathis Wackernagel and Ian Moffat were to engage in a debate about the usefulness of the ecological footprint, Mathis Wackernagel might conclude by saying the ecological footprint is the best tool we have to measure sustainable resource use and we are refining the methodology. Ian Moffat might conclude his remarks by saying:
We are ready to continue addressing the problem of conspicuous consumption.
Clearly, the ecological footprint has overestimated global overshoot.
The ecological footprint should be abandoned because of its flaws.
Making policy decisions based on unscientific methodology is a mistake.
Making policy decisions based on unscientific methodology is a mistake.
About how many times larger was the global ecological footprint in 2007 than it was in 1962?
0.5
2
5
10
2
Which two statements are supported by the data in the graph?
In 1970, we began to overshoot Earth's capacity to support us.
The global ecological footprint has only increased over time, and never decreased.
In 2007, the average American used about 1.5 times the amount of renewable natural resources Earth can support.
For over 50 years, people have used renewable resources faster than the Earth could replenish them.
The global ecological footprint will continue to rise for some time, but it can never increase above two planets.
The global ecological footprint has generally increased over time, with brief periods of decrease.
In 1970, we began to overshoot Earth's capacity to support us.
The global ecological footprint has generally increased over time, with brief periods of decrease.
