Generate a headline for the following article.
This article discusses the future of renewable energy sources in the US.
"The Future of Renewable Energy in the US: a Comprehensive Outlook"
Complete the following task based on the instruction and optional input provided.### Instruction:
Generate a headline for the following article.

### Input:
This article discusses the future of renewable energy sources in the US.

### Output:
"The Future of Renewable Energy in the US: a Comprehensive Outlook"