Read the following context and choose the best option to answer the question.
Context: There 's such a huge focus on global warming right now that we are forgetting other environmental issues and the reasons that the climate is changing like this . Global warming is a global problem , but for me it seems that people are n't seeing the whole picture . We 're focusing on the effect and trying to fix that , but we 're not seeing the cause .
Question: What might the person think is one solution ?
Options: 
A. Emitting more greenhouse gases
B. Using more coal powered energy
C. Putting more cars on the road
D. Switching to solar power


D