× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
c
5
j
5
a
5
L
5
f
5
j
5
D
4
k
4
y
4
t
4
h
4
l
4
Home Q & A Board Biology-Related Homework Help Environmental and Conservation Biology
New Topic  
Leahh3749 Leahh3749
wrote...
Go to Answer
Posts: 571
Rep: 0 0
6 years ago
In the United States, air quality has ________ in the past 40 years. In China, air quality has ________ over the same time period.
 
  A) gotten worse; also gotten worse B) improved; gotten worse
  C) improved; improved even more D) gotten worse; improved
Textbook 
A Changing Planet

A Changing Planet


Edition: 1st
Author:
Read 65 times
1 Reply
Replies
Answer verified by a subject expert
jash.linkjash.link
wrote...
#1
Posts: 384
Rep: 4 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

Leahh3749 Author
wrote...

6 years ago
Thanks
Mcb
wrote...

Yesterday
Brilliant ツ
patod1
wrote...

2 hours ago
Just got PERFECT on my quiz
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  702 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 903
  
 504
  
 366
Your Opinion
How often do you eat-out per week?
Votes: 80
Previous poll results: Should Ph.D.'s be addressed as doctors?