What are some free ecosystem and economic services provided by inland wetlands?
What will be an ideal response?
Inland wetlands take part in: filtering and degrading toxic wastes and pollutants; reducing flooding and erosion by absorbing storm water and releasing it slowly, by absorbing overflows from streams and lakes; sustaining stream flows during dry periods; recharging groundwater aquifers; maintaining biodiversity by providing habitats for a variety of species; supplying valuable products such as fishes and shellfish, blueberries, cranberries, and wild rice; and providing recreation for birdwatchers, nature photographers, boaters, anglers, and waterfowl hunters.
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The danger of quick clay is enhanced when the ____
a. ?clay plates form triangular or tetrahedral structures b. ?clay layer is frozen c. ?clay grains align with slope angle d. ?clay grains compact to take up less space e. ?clay absorbs moisture
In order to extract kerogen, it must be ________.
A. Removed by a salt/brine solution B. Converted to a gas before it can be transported C. Heated to 480°C D. Kept at a temperature of 25°C or below, or it will evaporate
Today genetic engineering includes recombinant DNA techniques
Indicate whether the statement is true or false.
Of which of the following minerals does South Africa NOT lead the world in reserves?
A) platinum B) manganese C) gold D) coal