You can use solar energy at any moment, you don't have to wait until 2012. The "solar cycles" refer to cycles of sunspots; they are not very relevant to the amount of energy we receive from the Sun.
Solar energy is the source of energy behind the carbon cycle.
The energy source behind the water cycle is solar energy. It is the only energy which initiates water cycle.
Solar energy is the source of energy behind the carbon cycle.
Solar energy is the source. it helps in evaporation of water.
The Sun is the ultimate source of energy for every cycle on Earth. Solar radiation provides the energy needed for processes like photosynthesis, weather patterns, and the water cycle.
geothermal, solar
solar light is the source of energy for a solar light
The sun evaporates water, which condenses onto dust particles to make clouds, which precipitates to form rain
A solar cell is not an energy source, but an energy converter. In the case of solar, the energy source is light, and the solar cell converts it from light energy to electrical energy.
Sun is the source of solar energy. Heat is present in solar energy.
Clouds are the source of rain,through what is known as the water cycle, where fog is low hanging clouds picking up water to the clouds from water sources.
Solar energy in an abundant renewable energy source. As long as the sun shines there will be a source of solar energy.