This document discusses the differences between nonrenewable and renewable resources. Nonrenewable resources such as coal, petroleum, natural gas and uranium cannot be replaced at the same rate at which they are being used. Coal, petroleum and natural gas are fossil fuels that take millions of years to form. Uranium is used for nuclear energy but is limited. Renewable resources like solar, wind, water and biomass can be replenished naturally in a short period of time through natural processes.