Oil, natural gas, and coal are considered to be nonrenewable resources. why are these fuels considered to be nonrenewable?

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?