Which action does NOT help reduce carbon dioxide emissions?

Traveling more frequently by air contributes significantly to carbon dioxide emissions due to the high fuel consumption and greenhouse gases produced during flights. In contrast, switching to renewable energy sources, reducing car usage, and increasing energy efficiency are all effective strategies for lowering carbon dioxide emissions. Renewable energy sources, like wind or solar, produce little to no emissions compared to fossil fuels. Reducing car usage leads to lower emissions from vehicles, and improving energy efficiency means using less energy for the same output, which ultimately decreases carbon dioxide emissions. Therefore, the choice of increasing air travel does not align with efforts to mitigate climate change and reduce carbon emissions.