In Moffat's article (Ref. 41), she quotes U.S. Department of ...

[s.tung]

In Moffat's article (Ref. 41), she quotes U.S. Department of Agriculture agronomist Rufus Chaney that it would cost less than one-tenth the price tag for either digging up and trucking the soil to a hazardous waste landfill or making it into
 
  concrete to use plants for removing metal from contaminated soil. Suggest reasons why this approach should be so much less costly.

Question 2

A blue pansy flower reflects red and green light from sunlight.
 
  What will be an ideal response?

[thall411]

Answer to Question 1

The cost can be much lower because the majority of the cost of a cleanup is for
salaries of workers and for use of specialized equipment. As the quote suggests, disposal of
the waste material is also a big expense.
With phytoremediation, plants do most of the cleanup while costing little to nothing: plants
do not demand a living wage. Plants (or also possibly animals) concentrate certain waste
products in one place. The plants can be incinerated and the valuable materials concentrated
further and used again as a resource.

Answer to Question 2

The reverse is true: it is blue because it reflects blue and absorbs red and green
from the spectrum of sunlight.

[s.tung]

Both answers were spot on, thank you once again

[thall411]

Great! Please up vote