Background: Carbon dioxide is the most significant long-lived greenhouse gas in Earth's atmosphere. Since the Industrial Revolution anthropogenic emissions – primarily from use of fossil fuels and deforestation – have rapidly increased its concentration in the atmosphere, leading to global warming.  Carbon dioxide also causes ocean acidification because it dissolves in water to form carbonic acid.

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied the most significant long-lived greenhouse gas in Earth's atmosphere?
Answer: Andy

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied another significant long-lived greenhouse gas in Earth's atmosphere?
Answer: Ben

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied more about anthropogenic emissions?
Answer: Andy

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied less about anthropogenic emissions?
Answer: Ben

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied less about the use of fossil fuels?
Answer: Ben

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied more about the use of fossil fuels?
Answer: Andy

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied more about deforestation?
Answer: Andy

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied less about deforestation?
Answer: Ben

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied less about ocean acidification?
Answer: Ben

Situation: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.

Question: Which researcher studied more about ocean acidification?
Answer: Andy

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county generated more anthropogenic emissions?
Answer: Brown

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county generated fewer anthropogenic emissions?
Answer: Green

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county released fewer greenhouse gases in Earth's atmosphere?
Answer: Green

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county released more greenhouse gases in Earth's atmosphere?
Answer: Brown

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused more deforestation?
Answer: Brown

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused less deforestation?
Answer: Green

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused less global warming?
Answer: Green

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused more global warming?
Answer: Brown

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused more ocean acidification?
Answer: Brown

Situation: Two counties were part of the same region. Green county used alternative methods to produce energy, while Brown county used fossil fuels and released a lot of carbon dioxide into the atmosphere.

Question: Which county caused less ocean acidification?
Answer: Green

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country released more carbon dioxide into the atmosphere?
Answer: Mongolia

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country released less carbon dioxide into the atmosphere?
Answer: China

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country released fewer anthropogenic emissions?
Answer: China

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country released more anthropogenic emissions?
Answer: Mongolia

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused more deforestation?
Answer: Mongolia

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused less deforestation?
Answer: China

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused less global warming?
Answer: China

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused more global warming?
Answer: Mongolia

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused more ocean acidification?
Answer: Mongolia

Situation: China used alternative fuels to generate electricity, while Mongolia burned lots of fossil fuels. There were frequent debates between the two countries on this matter.

Question: Which country caused less ocean acidification?
Answer: China

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read more about the most significant long-lived greenhouse gas in Earth's atmosphere?
Answer: Ted

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read less about the most significant long-lived greenhouse gas in Earth's atmosphere?
Answer: Larry

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read less about the Industrial Revolution?
Answer: Larry

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read more about the Industrial Revolution?
Answer: Ted

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read more about anthropogenic emissions?
Answer: Ted

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read less about anthropogenic emissions?
Answer: Larry

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read less about ocean acidification?
Answer: Larry

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read more about ocean acidification?
Answer: Ted

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read more about carbonic acid?
Answer: Ted

Situation: Ted and Larry studied environmental sciences. They are learning about greenhouse gasses this week. Ted reads about carbon dioxide, while Larry reads about methane gas.

Question: Which student read less about carbonic acid?
Answer: Larry