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
Elanso [62]
4 years ago
13

Why was 1990 an important year regarding air quality?

Chemistry
1 answer:
Rus_ich [418]4 years ago
7 0

Answer:

The United States took first steps to keep the air clean.

Explanation:

The US environmental protection agency was created in the year 1970 so this option is wrong.

November 15, 1990 however was a milestone in keeping the air clean, the signing f the amendments, the amendments set the stage for protecting the ozone layer, improving air quality and visibility.

The correct option is option A; The United States took first steps to keep the air clean.

You might be interested in
Balance the equation:2Na+3H2O-2NaOH+H2​
aleksandrvk [35]

Answer:

2Na + 2H2O → 2NaOH + H2

Explanation:

A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products.

7 0
4 years ago
carbohydrates which contain carbon, hydrogen, and oxygen can provide energy, structure, and hormones. True or False
aivan3 [116]
It is true! So yeah, true overall
4 0
3 years ago
Explain what keeps the electrons confined in the space surrounding the nucleus
vitfil [10]

Answer:

Electrons are trapped inside the atom because of the attraction forces with positively charged protons that are found in the nucleus.

8 0
3 years ago
What is a family in a periodic table?
igomit [66]

Answer:

A family is a vertical column .

The elements in a family have similar chemical properties.

8 0
3 years ago
Most lakes have rivers flowing out of them, carrying water to the ocean. However, some lakes, including the Great Salt Lake and
Ray Of Light [21]

The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.

<h3>What is a lake?</h3>

Lake is a small stream of running water or a channel for water.

Lakes are usually a standing body of water or slow moving. This means that some lakes, including the Great Salt Lake and the Dead Sea, have no outlet.

The lack of an outlet will affect the composition of these lakes by causing an accumulation of organic and inorganic nutrients due to decomposition of living materials.

Learn more about lakes at: brainly.com/question/858802

#SPJ1

3 0
2 years ago
Other questions:
  • Draw all the structural isomers for the molecular formula c4h9br. Be careful not to draw any structures by crossing one line ove
    9·1 answer
  • If 355 mL of 1.50 M aluminum nitrate is added to an excess of sodium sulfate, how many grams of aluminum sulfate will be produce
    8·1 answer
  • What is true about ionic compounds?
    14·1 answer
  • The difference between Ionic and Covalent bonding.
    8·1 answer
  • Given the following equation formats, which form matches a single replacement
    11·1 answer
  • What makes scientists think that arctic areas were once warm?
    15·1 answer
  • It get hotter towards the center
    5·1 answer
  • 80.0 grams of NaOH is dissolved in water to make a 6.00 L
    14·1 answer
  • Determine the expected mass of the copper after 24 hours
    6·1 answer
  • WWE Roman reigns vs john cena summerslam 2021 who won?<br>​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!