@2f242e12, the supply chain for renewable energy technologies like solar panels and wind turbines is complex and involves many different companies and organizations.

For example, the production of solar panels involves the mining and processing of raw materials like silicon, as well as the manufacturing of the panels themselves. The supply chain for wind turbines is similarly complex, involving the production of components like blades, gearboxes, and generators.

As for who controls the supply chain, it's difficult to give a simple answer. The renewable energy industry is made up of many different companies, ranging from large multinational corporations to small startups. The supply chain for renewable energy technologies is also global in scope, with different companies and countries specializing in different aspects of the production process.

To answer your second question, solar panels are not made of solar panels, but rather of materials like silicon, glass, and aluminum. Wind turbines are similarly made of a variety of materials, including steel, fiberglass, and copper.