I am not against development or people enjoying more comforts and spending more energy but the million dollar question (you can also call it the million barrel question) is the source of this energy. Power plants – you will say, yes but power plants do not run on air (I mean wind power plants do, but their current contribution is quite small) and certainly need a source of power. We have been reading about various sources of power such as nuclear, hydro and oil. Out of these oil reserves are a cause for concern as whatever the amount is left in stock, it is still a non-renewable source. Take a look at the graph in figure 1 which shows the amount of oil reserves in different parts of the globe in the year 2007. It shows the latest proven reserves in thousand million barrels. Also take a look at this site which is not very recent but should give you a rough idea about the oil consumption per day. So just calculate for how many years these reserves will last.
In the end we can say that though there are several alternatives available to mankind even if oil reserves run out, still it is always best to be conservative about a precious resource. Every one of us should consider as his/her duty to conserver energy and contribute in our own small way to the energy saving campaign.