Why is solar energy not yet more widely used1. it has been difficult to produce electricity using solar power? 2. fossil fuels are widely distributed and inexpensive3. the process produce dangerous waste products4. sufficient sunlight reaches only a few locations

Solar panels are expensive, they are kept this way by the companies.

The price ranges around $10.000 - $15.000 for an installation. It takes years to get this investment back and in the meantime the batteries need to be changed and power converter need to be maintenance, etc.

your answer is 4. sufficient sunlight reaches only a few locations

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.