Source Share of methane / % cattle 40 rice fields 20 landfill sites 25 other sources 15 The graph shows that the amount of methane in the atmosphere has inc...
Question 1 Report
| Source | Share of methane / % |
|---|---|
| cattle | 40 |
| rice fields | 20 |
| landfill sites | 25 |
| other sources | 15 |
The graph shows that the amount of methane in the atmosphere has increased steadily. The table lists the main sources of methane and how much each contributes. Which source releases the most methane?
Answer Details
The graph and the table answer two different questions. The rising curve shows that the amount of methane in the atmosphere has increased over time, but it says nothing about where the gas comes from. The source is read from the table instead.
The shares given are 40% from cattle, 25% from landfill sites, 20% from rice fields and 15% from other sources. Cattle therefore release the most, and the figures add to 100%, confirming that the whole supply has been accounted for.
Methane is produced by microbes acting on plant material without oxygen, in the digestive systems of cattle, in flooded rice paddies and in buried waste. When a question gives both a graph and a table, take each piece of information from the one that actually shows it.
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