Human Influences on the Environment
1. This question has 2 part(s).
1.1. Large quantities of food are wasted every year. Waste food needs to be disposed of using methods that do not harm the environment.
The table shows the mass of each gas released into the air from three different methods of waste disposal.
Method of waste disposal | Mass of each gas released into the air from 1000 kg of waste food in kg | |||
|---|---|---|---|---|
Carbon dioxide | Carbon monoxide | Methane | Sulfur dioxide | |
Anaerobic digester | 37 | 0.012 | 3.05 | 0.23 |
Burying in landfill | 220 | 0.680 | 14.70 | 3.12 |
Burning | 680 | 0.059 | 3.12 | 0.08 |
Calculate how much carbon dioxide would be released from 125 kg of waste food when using an anaerobic digester.
Give your answer to two significant figures and in kilograms.
1.2. Some scientists have claimed that anaerobic digesters are the most environmentally friendly method of waste disposal.
Evaluate this claim using data from the table and your own knowledge.
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