The company Abengoa Solar has proposed to build the largest solar power plant in the world ("Solana") in Arizona, but the absence of McCain and Obama in the senate this week due to campaigning may kill the project. This project will only happen if Congress renews the clean energy tax credit that is set to expire at the end of 2008. A vote may be held this week to extend the tax credits. In June, a vote fell seven votes short--Obama, McCain, Clinton, and Kennedy were absent. Kennedy isn't expected back in the Senate until September, while Clinton should be on hand to vote. If McCain were to vote, it is likely he could bring a few Republican votes with him. However, he would have to choose between a tax increase in his home state and the project, and the business community would likely lobby against it.
"... beyond the benefits of green, renewable energy, the billion-dollar investment in Solana would create 1,500 construction jobs and 85 permanent, highly skilled positions. The project would be built and owned by Abengoa Solar. The Arizona utility would purchase energy from the Spanish engineering firm; Abengoa estimates that the nearly 2,000-acre plant could sell $4 billion worth of energy over 30 years."
The plant would power up to 70,000 homes and would be the first example of a major utility getting the majority of its energy from solar power.
The senior adviser to the company's US branch noted that "Without the tax credit, 'not only won’t this plant happen, but a plant that will put carbon emissions into the atmosphere for 30 or 40 years will have to be built instead of this.'"
The article is here.
More information on the project is here and here.
I don't have an answer aside from begging the candidates to vote on this. This is a non-partisan appeal to do the right thing.