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Nearly everything we do in our modern lives requires the use of Earth's natural resources.
在我们的现代生活中，我们做的几乎每一件事都要用到地球的自然资源。
These natural resources provide the energy to do many important things: for transport, for boiling water, and for powering electrical equipment.
这些自然资源为做许多重要的事情提供能量：运输、烧开水及为电器供电。
The list is almost endless.
这一列表几乎是无穷无尽的。
For all these things, we mostly depend on fuels such as coal, gas and oil to produce energy.
为了能做所有这些事情，我们主要依靠燃料，如煤、天然气和石油来产生能量。
Coal, gas and oil are found underground.
煤、天然气和石油在地下找到。
Once deposits of these fuels are used up, they are gone.
一旦这些燃料的储量用光了，它们就没有了。
We are no consuming these fuels at a much higher rate than they are being produced.
我们现在消耗这些燃料的速度要远远超出生产这些燃料的速度。
Some people believe that if this continues, oilfields and coal mines will become empty in the future.
一些人相信如果这种情况继续下去，油田和煤层在将来将会枯竭。
On top of this, burning these fuels produces carbon dioxide, which is harmful to the environment.
此外，燃烧这些燃料产生二氧化碳，而二氧化碳对环境有害。
Carbon dioxide contributes to air, water and soil pollution and causes acid rain.
二氧化碳是造成空气、水和土壤污染的原因之一，造成酸雨。
This is why many people are pushing for the use of alternative energy sources.
这就是许多人正在强烈要求使用替代能源的原因。
