answersLogoWhite

0

In the last 30 years air quality has generally improved. Amount of most major air pollutants have decreased. Many newer cars cause less pollution.

User Avatar

Wiki User

7y ago

What else can I help you with?

Related Questions

In inflatation adjusted dollars how have average wages in the united states changed in the last 20 years?

It has changed in terms of development and the economy of the country.


What is the uniform drinking age across the US?

In the United States it is currently 21 years of age.In the United States it is currently 21 years of age.In the United States it is currently 21 years of age.In the United States it is currently 21 years of age.In the United States it is currently 21 years of age.In the United States it is currently 21 years of age.


How and why has the air quality changed in the United State over the last thirty years?

Air quality in the United States has generally improved over the last thirty years due to stricter regulations on industries, vehicles, and emissions. The Clean Air Act has played a significant role in reducing pollutants such as sulfur dioxide and lead. However, challenges remain, especially concerning air pollution from transportation and wildfires.


Has Easter changed over the years?

In the United States, yes, Easter, like most religious holidays, has become more commercialized,


How long is the term of a senator and a representative?

An United States Senator's term is 6 years long with the requirements of 9 years of being in the United States An United States Representative's term is 2 years long with the requirements of 7 years of being in the United States


Have Florida car insurance rates changed significantly in the past few years?

They have not really changed much over the past year. It is still one of the most expensive rates in the United States.


How would you describe the United States and Canadian border?

The United States and Canadian border is a peaceful border that for many years was not guarded. However 9/11 changed that. Now it is required for all people crossing the border to have passports and identification papers.


Qualifications for the presidency of the United States?

* Be a natural born citizen of the United States. * Be a least 35 years of age. * Been a resident within the United States for a least 14 years.


What are some of the qualifications for a United States Senator?

Be at least 30 years of age. Be a United States citizen for at least nine years.


How has space food changed in 50 years?

Space food has changed a lot in 50 years. The quality and the nutrition value has increased way to much.


What are the qualification to run the president?

The qualifications are to be35 years old or olderTo be a citizen of the United States and born in the United States not naturalizedTo have resided 14 years in the United States. This allows for a person to serve with the military or other positions outside of the United States.


What are qualification's to run for the president?

The qualifications are to be35 years old or olderTo be a citizen of the United States and born in the United States not naturalizedTo have resided 14 years in the United States. This allows for a person to serve with the military or other positions outside of the United States.