Background: Because of human activities, there is more carbon dioxide in the atmosphere today than in the past hundreds of thousands of years. Burning fossil fuels and has released great quantities of carbon dioxide into the atmosphere. Cutting forests and clearing land has also increased carbon dioxide into the atmosphere because these activities reduce the number of autotrophic organisms that use up carbon dioxide in photosynthesis. In addition, clearing often involves burning, which releases carbon dioxide that was previously stored in autotrophs.

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village burned more fossil fuels?
Answer: village B

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village burned fewer fossil fuels?
Answer: village A

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village cut more forests?
Answer: village B

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village cut fewer forests?
Answer: village A

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village cleared more land?
Answer: village B

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village cleared less land?
Answer: village A

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village indirectly reduced the number of  autotrophic organisms?
Answer: village B

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village hasn't reduced the number of  autotrophic organisms?
Answer: village A

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village burned more land after clearing?
Answer: village B

Situation: When comparing village A from ten thousand years ago to village B from today, we reached the conclusion that today's villagers release much more carbon into the atmosphere by their activities.

Question: Which village burned less land after clearing?
Answer: village A

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county.

Question: Which researcher found more carbon dioxide in the atmosphere?
Answer: Bob

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county.

Question: Which researcher found less carbon dioxide in the atmosphere?
Answer: Tim

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found evidence of cut forests?
Answer: Bob

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found no evidence of cut forests?
Answer: Tim

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found less evidence of land clearing?
Answer: Tim

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found more evidence of land clearing?
Answer: Bob

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found that human activities reduced the number of autotrophic organisms?
Answer: Bob

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher didn't find that human activities reduced the number of autotrophic organisms?
Answer: Tim

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher didn't find that clearing often involves burning?
Answer: Tim

Situation: Two researchers looked at the human influence on atmospheric carbon dioxide levels. Tim studied a human settlement from 10000 years ago, while Bob studied a present day county. Today's economy in the county revolved around extensive agriculture.

Question: Which researcher found that clearing often involves burning?
Answer: Bob

Situation: Two cities had different energy source. Big city burned fossil fuels, while Blue city used alternative sources of energy.

Question: Which city produced more carbon dioxide?
Answer: Big

Situation: Two cities had different energy source. Big city burned fossil fuels, while Blue city used alternative sources of energy.

Question: Which city produced less carbon dioxide?
Answer: Blue

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city contributed more to global warming?
Answer: Big

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city contributed less to global warming?
Answer: Blue

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city cut more forests?
Answer: Big

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city cut fewer forests?
Answer: Blue

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city cleared fewer lands?
Answer: Blue

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city cleared more lands?
Answer: Big

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city destroyed more autotrophic organisms?
Answer: Big

Situation: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy.

Question: Which city destroyed fewer autotrophic organisms?
Answer: Blue