Question 5

Warming because of farming and fuel use adding nitrous oxide to the atmosphere

Human activities such as farming and the use of fossil fuels contribute to climate change by increasing the levels of nitrous oxide in the atmosphere, which is a potent greenhouse gas.

A) Warming because of farming and fuel use adding nitrous oxide to the atmosphere

This option correctly identifies a direct consequence of human activity on climate change. The use of fertilizers in agriculture and combustion of fossil fuels release nitrous oxide, which traps heat in the atmosphere, leading to global warming.

B) Year to year differences in snowfall in a given area from different weather patterns

While this option describes variability in weather, it does not specifically link to human-induced climate change. Yearly differences in snowfall can be attributed to natural climate variability rather than long-term climatic shifts caused by human activity.

C) Weather changes from regularly repeating atmospheric conditions such as El Nino

This option refers to natural climatic phenomena that occur independently of human influence. While El Nino can affect weather patterns, it is not an example of climate change driven by human actions.

D) Worldwide weather changes from changes in the flow of air currents

This option discusses changes in air currents that can influence weather patterns but does not directly connect to human-induced climate change. Changes in air currents can be a result of natural processes rather than anthropogenic factors.

Conclusion

Option A is definitively correct as it highlights the impact of human activities, specifically farming and fossil fuel use, on the increase of greenhouse gases like nitrous oxide, which contributes to climate change. The other options either relate to natural variability or processes that do not stem from human actions, thus failing to address the question's focus on human-caused climate change.