Suppose someone suggested launching radioactive waste into space. What would be the potential
drawbacks of this approach apart from cost considerations? What will be an ideal response?
The greatest risk from this would be the possibility of an accident in which radioactive substances
might be dispersed into the upper atmosphere of the Earth. Alpha and Beta decay, for example, are
much more problematic where inhaled particles are concerned. Dust from an explosion at high level
could literally blanket the globe.
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Acid rain has a negative impact on ecosystems and accelerates the chemical weathering of concrete structures and marble building materials. Which of the following compounds released by human activity are responsible for acid rain?
A. ozone and nitrogen oxide B. sulfur dioxide and carbon dioxide C. ozone and carbon monoxide D. sulfur dioxide and nitrogen oxide E. carbon monoxide and carbon dioxide
Less than 5 percent of eroded sediment will ever reach the sea
Indicate whether the statement is true or false.
Biodiversity enhances human food security because it ________
A) decreases the number of predators B) means that there is genetic uniformity C) is a potential source of new food items or new genetic varieties of existing foods D) reduces the number of pollinators available to any one plant species E) increases the number of available pathogens
The rise of the crust after removal of ice is called ________.
A. crustal rebound B. upheaval C. tectonic uplift D. dynamic adjustment E. subduction