A.I. Explanation:

Option 1: "There is too much traffic on the city's roads."

Explanation: While the text mentions that fumes from vehicles stuck in congested traffic contribute to air pollution, it does not state that traffic is the biggest cause. This option presents a general observation rather than addressing the specific argument made by the writer regarding the government's role.

Option 2: "There has been a 30% increase in the use of natural gas."

Explanation: The text does not provide any information about an increase in the use of natural gas. Instead, it highlights that the government is taxing natural gas at a higher rate than petroleum coke, which discourages its use. Therefore, this option is not supported by the text.

Option 3: "The government is encouraging the use of a dangerous fuel."

Explanation: The text clearly states that the government's policy is to blame for worsening pollution, as it discourages the use of cleaner natural gas in favor of petroleum coke, which is described as a dangerous and dirty fuel. This aligns directly with the writer's argument about the government's role in promoting pollution.

Option 4: "Farmers are using petroleum coke to burn unwanted waste."

Explanation: The text mentions that farmers burn agricultural waste, but it does not specify that they are using petroleum coke for this purpose. Instead, it indicates that small industries are using petroleum coke as a fuel source. Thus, this option misrepresents the information provided in the text.