説教

(During her lecture, the professor tells the students that a great deal of the advertising)

During her lecture, the professor tells the students that a great deal of the advertising

(that's done these days is very wasteful.)

that's done these days is very wasteful.

(She provides two examples to defend her argument.)

She provides two examples to defend her argument.

(First of all, the professor points out the large amount of paper that is wasted to make advertisements.)

First of all, the professor points out the large amount of paper that is wasted to make advertisements.

(She states that students have most likely been given ads)

She states that students have most likely been given ads

(while walking down the street or going to the subway station,)

while walking down the street or going to the subway station,

(but they probably just threw the ads away like most other people do.)

but they probably just threw the ads away like most other people do.

(She comments that there are all kinds of ads placed everywhere,)

She comments that there are all kinds of ads placed everywhere,

(and she claims it requires millions of trees each year to make the paper the ads are printed on.)

and she claims it requires millions of trees each year to make the paper the ads are printed on.

(Next, the professor talks about the billboards on the sides of roads and in cities.)

Next, the professor talks about the billboards on the sides of roads and in cities.

(She says that they not only waste electricity)

She says that they not only waste electricity

(but that they also use important natural resources while having little effect on consumers.)

but that they also use important natural resources while having little effect on consumers.