Hello Heather.
As there are many people and businesses in the supply chain for renewable energy installation and component manufacture and distribution, it is through these channels the jobs are created.
As the microgeneration and renewable energy industry flourishes, a greater number of people are required to maintain the fruits of this global environmentally friendly evolution, far more than that required by conventional power generation methods. As populations grow both the demand for more energy increases, along with the requirement to have an active working population, both can be supported by a thriving renewable energy industry.
I hope my opinion clarifies in some way...
Kind regards,
Richard.