Identifying Flaw in Energy Economics Argument

In a recent policy discussion, a government official argued that measures to reduce carbon emissions should be prioritized. They stated, "We should invest in renewable energy sources because fossil fuel prices are rising, which proves they are less economically viable for the future." However, critics argue that the rising prices of fossil fuels are a temporary market trend and do not necessarily indicate a long-term unprofitability.

Based on this discussion, identify the flaw in the reasoning of the government official.