Correct Answer:
B. Carbon dioxide
The question asks which greenhouse gas primarily causes an increase in environmental temperature. The correct answer is Carbon dioxide (CO2). CO2 is the most significant anthropogenic greenhouse gas, meaning it is largely produced by human activities, primarily the burning of fossil fuels. It traps heat in the Earth's atmosphere, enhancing the natural greenhouse effect and leading to global warming and climate change.
- Nitrogen is the most abundant atmospheric gas but is not a greenhouse gas.
- Carbon monoxide is a toxic air pollutant but not a primary direct greenhouse gas contributing to global warming.
- Sulfur compounds contribute to acid rain and aerosols, but elemental sulfur is not a greenhouse gas responsible for temperature increases.