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They are both good. They both produce electricity without any carbon emissions, so they contribute nothing to the problem of global warming. They are both renewable, which means they don't cost anything to run, apart from day to day maintenance, and the power continues to come even after we use it. Both have disadvantages: solar needs the sun to shine, and tidal energy only happens a few times a day and only in suitable locations.
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What is the roots of all from of energy?
Historically, it was the Sun, which created the plant life and animal life used to make energy, and which formed fossil fuels. Even hydroelectric energy is dependent on solar heating to return water to its sources. And because we now have nuclear energy, the answer could be "from nuclear reactions" -- fusion on the Sun and fission in nuclear generators. This, however, neglects the use of tidal energy and geothermal energy. Tidal energy is caused primarily by the gravitation of the Earth and Moon, not the Sun. And geothermal energy is drawn from magma formed by crustal movements, which ultimately are driven by the Earth's hot core. The heat there is a combination of radioactive heat, tidal heat from the Sun's gravity, and energy left from the formation of the planet. The ultimate source, therefore would have to be "gravity" because it formed the Sun and planets, keeps fusion going, moves the tides, and keeps the Earth's core hot enough to produce tectonics.
Where does the main source of energy in the food chain come from?
Sun
Is the sun the source of all life on earth?
The sun is the source of most of the energy on Earth. Oceans come second.
Where do plants get the energy to make food?
Photosynthesis is the act of trapping the light energy from the sun and turning it into chemical energy in the molecule starch. The energy it traps comes from high energy photons.
Plants are the ultimate source of energy?
No, because plants receive their energy from the sun via photosynthesis.
