Increasing research and development into new forms of renewable energy are most important because a) the price of gasoline is high. b) people like saving the planet. c) current forms of energy are being depleted. d) it is better to keep innovation progressing.

C)current forms of energy are being depleted.

Renewable energy is energy that is obtained from renewable sources, which are usually supplied on an individual timescale, such as daylight, blow, rainfall, waves, tides, and geothermal energy. Renewable energy usually produces energy in four major sectors: power production, air and liquid heat/cooling, moving, and rural (off-grid) power services.