Background: One result of air pollution is acid rain. Acid rain is precipitation with a low (acidic) pH. This rain can be very destructive to wildlife. When acid rain falls in forests, freshwater habitats, or soils, it can kill insects and aquatic life. It causes this damage because of its very low pH. Sulfur oxides and nitrogen oxides in the air both cause acid rain to form ( Figure below ). Sulfur oxides are chemicals that are released from coal-fired power plants. Nitrogen oxides are released from motor vehicle exhaust.

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had more problems with acid rain?
Answer: Italy

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had fewer problems with acid rain?
Answer: Greece

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had precipitation with low pH?
Answer: Italy

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had precipitation with a higher pH?
Answer: Greece

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had more acid precipitation fall in forests?
Answer: Italy

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had less acid precipitation fall in forests?
Answer: Greece

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had less acid precipitation fall in freshwater habitats?
Answer: Greece

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had more acid precipitation fall in freshwater habitats?
Answer: Italy

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had more acid precipitation fall on soils?
Answer: Italy

Situation: Italy and Greece attended the World Ecological Conference. they were looking for solutions to improve their environment. Italy's air was very polluted, while Greece had problems with drought.

Question: Which country had less acid precipitation fall on soils?
Answer: Greece

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned more about air pollution?
Answer: Jim

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned less about air pollution?
Answer: Dan

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned less about precipitation with a low (acidic) pH?
Answer: Dan

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned more about precipitation with a low (acidic) pH?
Answer: Jim

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned that acid rain falls in forests?
Answer: Jim

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist didn't learn that acid rain falls in forests?
Answer: Dan

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist didn't learn that acid rain falls in freshwater habitats?
Answer: Dan

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned that acid rain falls in freshwater habitats?
Answer: Jim

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned more about the causes of acid rain formation?
Answer: Jim

Situation: Hydrologists studied two samples of rain water. Jim studied an acid rain sample from a nearby city, and Dan studied a sample of water from another town.

Question: Which hydrologist learned less about the causes of acid rain formation?
Answer: Dan

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had more conditions for developing acid rain?
Answer: Seattle

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had fewer conditions for developing acid rain?
Answer: Aspen

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had rain with a lower pH?
Answer: Seattle

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had rain with a higher pH?
Answer: Aspen

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had rain that can be very destructive to wildlife?
Answer: Seattle

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city didn't have rain that can be very destructive to wildlife?
Answer: Aspen

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city didn't have rain that can kill aquatic life?
Answer: Aspen

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had rain that can kill aquatic life?
Answer: Seattle

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had more sulfur oxides in the air?
Answer: Seattle

Situation: The ecologist moved from Aspen, where there was no air pollution, to Seattle which experienced a lot of air pollution. He started studying the weather there as well.

Question: Which city had fewer sulfur oxides in the air?
Answer: Aspen

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced more air pollution?
Answer: Hill

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced less air pollution?
Answer: New

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced less precipitation with a low (acidic) pH?
Answer: New

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced more precipitation with a low (acidic) pH?
Answer: Hill

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced more precipitation destructive to wildlife?
Answer: Hill

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced less precipitation destructive to wildlife?
Answer: New

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced less precipitation destructive to forests?
Answer: New

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced more precipitation destructive to forests?
Answer: Hill

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced more precipitation destructive to freshwater habitats?
Answer: Hill

Situation: Two counties paid a study about acid rain. They  found out Hill county had experienced that, while New county hadn't.

Question: Which county experienced less precipitation destructive to freshwater habitats?
Answer: New

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had higher levels of sulfur oxide in the atmosphere?
Answer: Ghana

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had lower levels of sulfur oxide in the atmosphere?
Answer: Brunei

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had lower levels of nitrogen oxides in the atmosphere?
Answer: Brunei

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had higher levels of nitrogen oxides in the atmosphere?
Answer: Ghana

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had more precipitation with a low pH?
Answer: Ghana

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had less precipitation with a low pH?
Answer: Brunei

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had less precipitation that was destructive to wildlife?
Answer: Brunei

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had more precipitation that was destructive to wildlife?
Answer: Ghana

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had larger amounts of low pH precipitation in the forests?
Answer: Ghana

Situation: Two countries were neighbors, separated by a mountain range. Ghana used fossil fuels to produce energy, but one of the consequences of that was increased air pollution and acid rain. Brunei was a country inhabited by nature lovers and tree huggers, so they were very protective of their environment.

Question: Which country had smaller amounts of low pH precipitation in the forests?
Answer: Brunei