参考答案:
One point about support provided, and one about limits of this data to show cause
The graph shows that there is a positive correlation between global temperature and CO2
concentration, which supports the hypothesis.
A correlation does not prove $CO_2$is the cause.
There are variations in the temperature anomaly which are not seen in the CO2
concentration, which suggests that $CO_2$conc is not the only factor.
Other factors may affect both $CO_2$concentration and temperature.
Evidence from other experiments has shown a causal relationship between CO2concentration and temperature.
本题详细解析:
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