what you think will be the greatest obstacle for the United States moving away from fossil fuels and toward greater use of renewable energy.

The Economic and capital costs , siting and strmission, market entry.

Explanation:

The greatest obstacle when moving from the fossil fuel to renewable energy is that of economic costs, as green or clean energy is reusable technology. Availability of infrastructure is needed for the make more energy for the natural resources as compared to the fossil fuels are more easily to extract as compared to building solar and wind farms. Like coals and natural gas accounts for 30 to 35 % of the market share as compared to the hydropower and other renewables.

Argon, carbon-14, and carbon-12

Answer light in color; silica-rich;