Background: Current Situation : Currently the heating effect of extra greenhouse gases (since the start of the industrial revolution) is equal to about . Thus the recent period has recorded parallel increases in concentration of carbon dioxide and average global temperature. As more greenhouse gases are put into the atmosphere the temperature will increase further. There are certain effects of a warmer Earth (discussed more in optional section), which could accelerate the process, even if no more greenhouse gases are put into the atmosphere (an unlikely prospect for the foreseeable future).

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet experienced the heating effect of greenhouse gases?
Answer: Earth

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet didn't experience the heating effect of greenhouse gases?
Answer: Moon

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet didn't experience an increased concentration of carbon dioxide?
Answer: Moon

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet observed an increased concentration of carbon dioxide?
Answer: Earth

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet observed an increased average global temperature?
Answer: Earth

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet didn't observe an increased average global temperature?
Answer: Moon

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet observed certain effects of a warmer Earth?
Answer: Earth

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet didn't observe certain effects of a warmer planet?
Answer: Moon

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet recorded parallel increases in concentration of carbon dioxide and average global temperature?
Answer: Earth

Situation: Moon and Earth were two sister planets, both inhabited by humans. People of Earth released large quantities of greenhouse gases into the atmosphere over the last decades, while Moon people were taking good care of their planet and the environment.

Question: Which planet didn't record parallel increases in concentration of carbon dioxide and average global temperature?
Answer: Moon

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties.

Question: During which decade did Earth experience a more prevalent heating effect because of green house gas emissions?
Answer: eighties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties.

Question: During which decade did Earth experience a less prevalent heating effect because of green house gas emissions?
Answer: twenties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties.

Question: During which decade did Earth experience an increased concentration of carbon dioxide?
Answer: eighties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties.

Question: During which decade did Earth experience a decreased concentration of carbon dioxide?
Answer: twenties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties.

Question: During which decade did Earth experience an increased average global temperature?
Answer: eighties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties. The eighties produced way more green house gasses than the twenties did.

Question: During which decade did Earth experience a decreased average global temperature?
Answer: twenties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties. The eighties produced way more green house gasses than the twenties did.

Question: Which decade contributed more to a further increase of atmospheric temperature?
Answer: eighties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties. The eighties produced way more green house gasses than the twenties did.

Question: Which decade contributed less to a further increase of atmospheric temperature?
Answer: twenties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties. The eighties produced way more green house gasses than the twenties did.

Question: Which decade didn't record parallel increases in concentration of carbon dioxide and average global temperature?
Answer: twenties

Situation: A group of researches studied the green house gas emissions and their effects on Earth and people during the eighties compared to the twenties. The eighties produced way more green house gasses than the twenties did.

Question: Which decade recorded parallel increases in concentration of carbon dioxide and average global temperature?
Answer: eighties