Background: The quantity of small plastic fragments floating in the north-east Pacific Ocean increased a hundredfold between 1972 and 2012.Marine pollution is a generic term for the harmful entry into the ocean of chemicals or particles. The main culprits are those using the rivers for disposing of their waste. The rivers then empty into the ocean, often also bringing chemicals used as fertilizers in agriculture. The excess of oxygen-depleting chemicals in the water leads to hypoxia and the creation of a dead zone.Marine debris, also known as marine litter, is human-created waste that has ended up floating in a lake, sea, ocean, or waterway. Oceanic debris tends to accumulate at the center of gyres and coastlines, frequently washing aground where it is known as beach litter.In addition, the Pacific Ocean has served as the crash site of satellites, including Mars 96, Fobos-Grunt, and Upper Atmosphere Research Satellite.

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees more debris floating in the ocean?
Answer: Tim

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees fewer debris floating in the ocean?
Answer: Joe

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees more marine pollution?
Answer: Tim

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees less marine pollution?
Answer: Joe

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees less hypoxia in the ocean?
Answer: Joe

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees more hypoxia in the ocean?
Answer: Tim

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees more oxygen-depleting chemicals in the water?
Answer: Tim

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees fewer oxygen-depleting chemicals in the water?
Answer: Joe

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees less marine litter?
Answer: Joe

Situation: Tim and Joe were two friends living near two different oceans. Tim lived on the Pacific coast while Joe lived on the Atlantic coast.

Question: Which friend sees more marine litter?
Answer: Tim

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed more plastic fragments floating in the ocean?
Answer: Dan

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed fewer plastic fragments floating in the ocean?
Answer: Vic

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed fewer chemicals which were polluting the ocean?
Answer: Vic

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed more chemicals which were polluting the ocean?
Answer: Dan

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed more fertilizers which cause marine pollution ?
Answer: Dan

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed fewer fertilizers which cause marine pollution ?
Answer: Vic

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed fewer oxygen-depleting chemicals in the water?
Answer: Vic

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed more oxygen-depleting chemicals in the water?
Answer: Dan

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed more dead zones in the water?
Answer: Dan

Situation: Two old friends were both oceanographers. They were both researching the levels of marine pollution in Earth's oceans. Vic studied the Arctic Ocean, while Dan studied the Pacific Ocean.

Question: Which friend observed fewer dead zones in the water?
Answer: Vic

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes more marine pollution?
Answer: Ecuador

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes less marine pollution?
Answer: Panama

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country dumps more chemicals into the ocean?
Answer: Ecuador

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country dumps fewer chemicals into the ocean?
Answer: Panama

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country dumps fewer fertilizers into the ocean?
Answer: Panama

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country dumps more fertilizers into the ocean?
Answer: Ecuador

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes more hypoxia in the ocean?
Answer: Ecuador

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes less hypoxia in the ocean?
Answer: Panama

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes fewer dead zones in the ocean?
Answer: Panama

Situation: Ecuador and Panama both had beautiful rivers flowing into the Pacific ocean. Ecuador uses their river to dispose of their waste while Panama is very eco-friendly and doesn't do that.

Question: Which country causes more dead zones in the ocean?
Answer: Ecuador