URPN 460 quiz 5

Accourding to Daly and Farley, why are exhausted species unlikely to be replaced by others in the long run?

*a. When a specie is near exhaustion, too many boats are after too few fish, if new replacements are found the problem only shifts to the new specie *b. We run the risk of exhausting the resource before we even have enough data to estimate sustainable yields c. The declines often involve habitat destruction that is even slower to repair and impact many species simultaneously d. International agreements are hard to enforce. e. Some countries fail to instigate limits on fishing. *3/5* pg.118

If a population of bacteria in a Petri dish doubles every 120 minutes, and it begins to double at noon on Monday, and is completely full on Tuesday at noon (and thereby crashes because it has no food and is overrun with it own waste), at what time was the Petri dish half full?

. 10:00 am Tuesday

Accroding students' presentation of "Enough", since the time of the Green Revolution, the world has known how to end famine, yet many people die of hunger, malnutrition, and related diseases in Africa. Why?

: a. Better planting regimens is not enough. b. Food aid from US undermines local markets and local farmers. e. Food aid alone was not enough

What are the key differences between a full-world and an empty-world?

In an empty world, human populations and resource use are quite low in comparison to resource availability such that it makes sense to ignore limits to growth and concentrate on developing systems that efficiently allocate labor, capital and consumer goods. c. In a full world, resources, especially non-renewable ones, are the limiting factor, which is exacerbated by increased population growth and per capita production. d. A full world is characterized by high resource use and limited resource availability.

In the discussion of "Conundrun, which of the followings are true?

a. The author wants to impose energy frugality by increasing fuel taxes and capping consumption . c. Most sustainable prouducts and eco-living strategies are relevant the real problems better. d. Advances in energy efficiency lower the cost of a given activity, which causes people to engage in that activity more. *3/4*

Actually the world is always full of some things and empty of others. In a empty world what is the world full of

a. mineral resources d. renewable resources e. fresh water f. fossil fuels

According to the lecture on a Houston watershed, Dr. Rogers focused on

a. the role of roads in contributing to development and increased watershed flow b. One watershed in Harris County c. the relationship between increased flow and development e. showed that the average flow is getting larger *4/5*

A common rule of thumb with respect to exponential growth rates states that

c. dividing 72 by the growth rate results in the doubling time

If we replaced the use of oil with solar energy using existing technology, without disrupting agriculture production, forestry or the environment what proportion of the energy demand associated with oil can be met by solar energy?

d. 20 to 50 percent

Water is one of the more threatening of the imminent resource shortages

pg. 116-118 *a. The Ogallala aquifer has turned the arid western U.S. into a breadbasket, but is now seriously depleted and tens of thousands of acres are expected to loose irrigation over the next 20 years at the present rate of depletion. *b. while climate change may increase rainfall, evaporation will dry it out faster too. *e. Even though hydrological cycle renews water, global consumption of water has tripled in the last 50 years. *f. Because 70% of water is used for agriculture, food shortages will be impacted by water shortages. *g. Humans are pumping rivers dry and mining aquifers faster than it can be replenished.

According to Daly and Farley, which of the following are the primary sources of limits to extraction rates with respect to renewable resources?

scarcity