[DOC] [TLE] Towards Sustainable Energy: The current Fossil Fuel problem and ... [PAR] Among these fossil fuels, oil is the most consumed for energy conversion, ... 
Some estimates say that there may only be as few as 20 years of oil left if the 
world keeps ... on the trend of increasing global consumption, resources are 
bound to run out. .... The methods use nature's most abundant substance, water, 
to bring the... [DOC] [TLE] fossil fuels - Missouri Department of Natural Resources [PAR] With the advent of fossil fuels such as oil, gas and coal we found new sources of 
... swamps that existed on earth from 100 million to 400 million years ago. ... 
addition to simply running out, there are increasing environmental problems ... 
Missouri coal limits its use as an energy source. ... Coal is the most abundant 
fossil fuel. [DOC] [TLE] Fossil Energy Study Guide: 300 million years ago 100 million years ... [PAR] earth was covered by huge swamps. ... The coal we use today took millions of 
years to form. ... Coal is not only our most abundant fossil fuel, it is also the one 
with ... the rest of the world has oil that can be pumped from the ground. We ... Mr. 
Watt used coal to make the steam to run his engine. ... rock, then dig out the coal. [DOC] [TLE] Free fossil fuels Essays and Papers [PAR] Free fossil fuels papers, essays, and research papers. ... Over the past 30 years, 
rising cost of fuel as forced many people to reconsider current and future ... 
resources such as coal, petroleum and natural gas, which are the most widely 
used fuel and .... In 1977, President Jimmy Carter claimed, We are now running 
out of oil. [DOC] [TLE] The End Of Fossil Fuels - Our Green Energy - Ecotricity [PAR] North Sea oil deposits are around 150 million years old, whilst much of ... 
Although humans probably used fossil fuels in ancient times, as far back as the ... 
Clearly fossil fuel reserves are finite - it's only a matter of when they run out - not if
. ... be found which will help extend this deadline slightly, but these can't last 
forever. [DOC] [TLE] Fossil fuel phase-out - Wikipedia [PAR] Fossil fuel phase out is the proposed energy transition beyond fossil fuels 
through multiple ... Its purpose is to reduce air pollution, mining tragedies, and 
greenhouse gas ... which called for phasing out coal power completely by the 
year 2030. ..... and deploying the technologies to use our abundant fossil fuel 
resources as... [DOC] [TLE] Lesson: Energy Resources [PAR] that may contain more total oil than all conventional reserves. Significant ... The 
U.S. has reserves of coal for 200-300 years. ... As supplies of conventional fossil 
fuels run low, society must ... that eventually the world will run out of these 
sources of energy. .... years at current rates of use. ... abundant and widespread 
on earth,. [DOC] [TLE] Will We Ever Stop Using Fossil Fuels? - University of Chicago [PAR] that we will greatly reduce the use of fossil fuels because we will run out of 
inexpensive fossil ... To a moderate extent this can be done by expanding the 
size of the .... decrease in its reserves-to-production ratio, but there remain many 
more years of coal reserves, at current consumption, than for either oil or natural 
gas. [DOC] [TLE] coal - National Geographic Society [PAR] Dec 22, 2012 ... Coal is the most abundant fossil fuel on Earth. ... It's the Pits ... Peat itself can be 
burned for fuel, and is a major source of heat ... Sub-bituminous coal is about 100 
million years old. .... To prevent the buildup of gases, methane must be constantly 
ventilated out of underground mines to keep miners safe. [DOC] [TLE] Energy: Scientific Principles [PAR] We can use this knowledge to determine the amount of energy in a system, the ... 
The thermal energy is converted to mechanical energy to make the engine run. 
.... most plentiful fossil or non-fossil fuel sources over the next hundred years in

Question: It's the most abundant fossil fuel on Earth & at current use may run out in 200-300 years
Answer: coal