Question

Over 300 million years ago (millions of years before dinosaurs lived), our planet was covered with prehistoric plant life and sea life. After these lifeforms died, hundreds and thousands of feet of sand, rock, mud—and sometimes whole oceans—piled up on top of them. Over time, intense heat and pressure transformed these organic materials into fossil fuels. Ancient aquatic life turned into natural gas and oil. Trees and plants turned into coal. The production of the fossil fuels we use today took 300 to 400 million years to occur. Because it takes so long to make fossil fuels, it's impossible for humans to make more within the time span of our existence. That's why these sources of energy are nonrenewable. They cannot be replaced once they are gone. Although no one can say for sure when fossil fuels will run out, many people speculate that in less than 100 years finding fossil fuels will be so challenging and expensive that their use will be nearly impossible on a large scale. Fossil fuels are called nonrenewable resources because ________. A they were made by dinosaurs, which are extinct B it is impossible for humans to make more in our lifetimes C they are easy to replace whenever they run out D it is possible to use them for many different purposes

Answer 1

Fossil fuels are called nonrenewable resources because **B it is impossible for humans to make more in our lifetimes**.