Answers are below the exercises.
We need marine algae a whole lot more than they need us.
_____ (Q) Trees and other land plants are very important, no doubt about it.
_____ (R) Think about it, 70 to 80 percent of all the oxygen we breathe comes from algae!
_____ (S) Without them we would really be sucking wind, but not for long!
_____ (T) But for pure survival, we couldn’t make it without algae.
_____ (U) At this point, you may be saying, “Yo! What about the trees and other land plants?”
Tim Beatley has long been a leader in advocating for the "greening" of cities.
_____ (Q) While these are important aspects of re-imagining urban living, they are not enough, says Beatley.
_____ (R) But too often, he notes, urban greening efforts focus on everything except nature.
_____ (S) And any vision of a sustainable urban future must place its focus squarely on nature, on the presence, conservation, and celebration of the actual green features and natural life forms.
_____ (T) Instead, elements such as public transit, renewable energy production, and energy efficient building systems are emphasized.
_____ (U) We must remember that human beings have an innate need to connect with the natural world (the biophilia hypothesis).