This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: With the Air Pollution Control Act and the Clean Air Act's subsequent amendments over the past few ... (Read 73 times)

jayhills49

  • Hero Member
  • *****
  • Posts: 559
on: Jul 16, 2018
With the Air Pollution Control Act and the Clean Air Act's subsequent amendments over the past few decades, air quality in the U.S. with regard to criteria pollutants has
 
  A) worsened, with all pollutants significantly increasing.
  B) remained about the same for all pollutants.
  C) significantly improved for all pollutants except lead, which has worsened.
  D) greatly improved for all pollutants.

Question 2

About 30,000 years ago, humans survived most like which of the following organisms?
 
  A) Roaming groups of omnivorous chimps
  B) Herds of herbivorous bison and elk
  C) Flocks of herbivorous geese migrating broadly across continents
  D) Isolated carnivorous cougars hunting for their own meals


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Kaytorgator

  • Sr. Member
  • ****
  • Posts: 345
Reply #1 on: Jul 16, 2018
Answer to Question 1

D

Answer to Question 2

A


jayhills49

  • Member
  • Posts: 559
Reply 2 on: Jul 16, 2018
:D TYSM

yeungji

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.

Did you know?

In 1844, Charles Goodyear obtained the first patent for a rubber condom.

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

An example of a homeostatic control system. An example of a homeostatic control system.
This Powertrain Control Module (PCM) is located under the hood on this Chevrolet pickup truck. This Powertrain Control Module (PCM) is located under the hood on this Chevrolet pickup truck.
Reorganization of the rat motor cortex following transection of the motor neurons that control ... Reorganization of the rat motor cortex following transection of the motor neurons that control ...
The Counteroffensive on Air Pollution The Counteroffensive on Air Pollution
The Counteroffensive on Air Pollution The Counteroffensive on Air Pollution
Allosteric control of liver PFK (c) Allosteric control of liver PFK (c)
Video: Epinephrine/NE (heart rate, altered blood flow, glycogenolysis & bronchodilation)

For a complete list of videos, visit our video library