A renewable resource is the one which can be replenished after a single use. These resources are abundantly available on planet earth. The examples include the water, wind and the sunlight. The tidal power is the resource which has the advantage of being a very predictable energy source and is renewable in nature. The energy is harnessed by the oceanic tides. The tides in the oceanic water emerge due to wind currents and the gravitational force of water exerted by the earth. The energy generated by the rise and fall of the tides is used to generate electricity through water turbine.
No, or at least not yet. there small and dont do much improvment. If they were much bigger and sucked better, including some touch-ups here and there, they would have a bigger effect on removing sea urchins.
An organism that cannot make its own food is called a heterotroph. All animals and species of fungi, along with some types of bacteria, are heterotrophs.
