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Nearly everything we do in our modern lives requires the use of Earth's natural resources.
在我們的現(xiàn)代生活中，我們做的幾乎每一件事都要用到地球的自然資源。
These natural resources provide the energy to do many important things: for transport, for boiling water, and for powering electrical equipment.
這些自然資源為做許多重要的事情提供能量：運輸、燒開水及為電器供電。
The list is almost endless.
這一列表幾乎是無窮無盡的。
For all these things, we mostly depend on fuels such as coal, gas and oil to produce energy.
為了能做所有這些事情，我們主要依靠燃料，如煤、天然氣和石油來產(chǎn)生能量。
Coal, gas and oil are found underground.
煤、天然氣和石油在地下找到。
Once deposits of these fuels are used up, they are gone.
一旦這些燃料的儲量用光了，它們就沒有了。
We are no consuming these fuels at a much higher rate than they are being produced.
我們現(xiàn)在消耗這些燃料的速度要遠遠超出生產(chǎn)這些燃料的速度。
Some people believe that if this continues, oilfields and coal mines will become empty in the future.
一些人相信如果這種情況繼續(xù)下去，油田和煤層在將來將會枯竭。
On top of this, burning these fuels produces carbon dioxide, which is harmful to the environment.
此外，燃燒這些燃料產(chǎn)生二氧化碳，而二氧化碳對環(huán)境有害。
Carbon dioxide contributes to air, water and soil pollution and causes acid rain.
二氧化碳是造成空氣、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.
這就是許多人正在強烈要求使用替代能源的原因。
