1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
andreyandreev [35.5K]
3 years ago
7

How and why has the air quality changed in the United States over the last 30 years?

Biology
1 answer:
Mars2501 [29]3 years ago
6 0

Answer:

It has gotten worse.

Explanation:

In the past 30 years, air quality in the United States has declined almost exponentially. Pollution is the main reason for the declination of air quality in the United States, but there are different kinds of pollution, including light pollution, noise pollution, air pollution, water pollution, etc. Air pollution can be caused by primary or secondary pollutants. Primary pollutants include carbon, nitrogen, and sulfur oxides as well as just general particles in the air. Secondary pollutants are formed when pollutants are exposed to sunlight via chemical reactions.

You might be interested in
98 POINTS 98 POINTS<br><br> PLS HELP MEEEE
blsea [12.9K]
I know them in Spanish 
Esta formado por los 206 huesos repartidos por casi todas las partes del cuerpo.  Que permiten el aparato locomotor  Que pueden ser largos, cortos, planos  Que forman el esqueleto y proteccion para los organos internos  Que se unen en tejido oseo, y tejido cartilaginoso  Que son la columna vertebral, craneo, y pelvis
7 0
3 years ago
Read 2 more answers
What is the vertical distance between a tough and eight crest
ikadub [295]
Wave height that should be it;)
4 0
3 years ago
Gregor Mendel used pea plants that were heterozygous for each of two traits—seed color and seed shape—to generate a dihybrid cro
11Alexandr11 [23.1K]

Answer:

A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that ... Gregor Mendel used pea plants that were heterozygous for each of two traits- seed colour and seep shape- to generate a dihybrid cross. The phenotypic ratio of the resulting offspring was nine with round and yellow seeds,

7 0
3 years ago
What does a food web diagram illustrate?
Black_prince [1.1K]


OK First we need to eliminate 2 answers which would be A and C

that leaves B and D

I believe the correct answer is D

because it explores all of the relationships of the food web as to just one.

hope this helps

6 0
3 years ago
Read 2 more answers
Relationships among Species X Y Boxing crabs gently carry anemones in their claws to sting predators and keep them away. The ane
Trava [24]

Answer:

idk for sure but here

Explanation:

a chart to describe some relationships among species. Relationships among Species X Y Boxing crabs gently carry anemones in their claws to sting predators and keep them away. The anemones feed off bits of food the crab drops. Fleas live on the warm body of a dog, biting the dog and eating its blood.

8 0
3 years ago
Read 2 more answers
Other questions:
  • What are the two key features present in all seed plants that contribute to their dominance of terrestrial ecosystems?
    7·1 answer
  • Auxins _____.
    8·2 answers
  • What does DNA contain?
    6·2 answers
  • Which description best contrasts adipose and muscle tissue?
    11·2 answers
  • All fossil fuels contain this element. A)Iron B)Hydrogen C)Copper D)Magnesium
    5·2 answers
  • The height of a type of plant is a normal distribution. Some plants are tall and
    14·1 answer
  • Can the energy in sunlight be converted to C,H, or O atoms?
    7·1 answer
  • Please help this will help me pass high school I just need this one answer please will like it
    15·1 answer
  • ASAPPPPP!!!
    8·1 answer
  • When dna microarrays containing asos are used to genotype snps, what form of dna constitutes the probe molecules?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!