Physical Characteristics and Behavior. 1  Like modern day big cats saber-tooth tiger had a strong built but much stockier than modern day cats. 2  It had short legs, short ears, and short feet. 3  It had a short tail too. 4  The cat had sharp claws powerful enough to rip off the flesh of prey.
Some examples of this are gas to run our car and coal burned in power plants. Once they are used, they are gone forever. A renewable energy source is one that can be replenished. Examples of this include hydropower from turbines in a dam, wind power from windmills, and solar power from the sun.
Renewable Energy Renewable energy is a greener way to produce electricity. The problem is that there is many forms of it available. Some are more reliable than others but they all have something in common. They all significantly reduce greenhouse gasses emissions. The main problem is that they are not constant for very long.