Renewable energies are inexhaustible sources provided by nature, like the sun or the wind. These energies could be:
Solar energy: can be converted on electricity or cold, as for example photovoltaic or thermal solar panels for the house or water heating.
Wind energy: can be converted on electricity through wind turbines.
Water energy: rivers water, tides water and waves water can be “transformed” on electric energy, as for example the barrages.
Geothermal energy: soil energy can also be converted on house or water heating.
The incentives to the use of renewable energies and the great interest that this subject raised over the last years, it is mainly due to possible scarcity of fossil resources (as the oil) and the need to reduce the harmful emissions of gases to the atmosphere and the GGE (greenhouse gases effect). This interest is, in part, due to the objectives of the EU, Kyoto protocol and the worries about climatic alterations.
The use of renewable energies ( as an example, the photovoltaic or thermal solar panels) for the heat production or electric energy through the progress of solar energy, is an area in which Portugal has a great abundance of resources, comparing the availability of sun hours per year with others countries of the EU.
Posted by: Rita Fragoeiro
I strongly defend the use of renewable and alternative energies, and, as you said Rita, Portugal has very good possibilities of exploiting these energies, especially the solar one.
ReplyDeleteThis idea has appeared due to 2 problems: the shortage of fossil fuels and the pollution derived from them.
It´s incredible of people tend to forget and ignore these serious questions and all they have to do is inform themselves, because it isn´t that expensive to buy a hybrid car and it is a good investment to buy solar panels, since they can contribute a lot for the energy used in home and in few years we have the investment all paid back.
As you can see we have the possibilities and the need, we only have to find some will!
Ricardo, 11ºLH2
I didn't want to say the same thing as Ricardo, but I agree with him and with Rita says in her post. Portugal can really explore these energies, and not only the solar, like Ricardo says above, but also the wind one.
ReplyDeletePeople don't care about the pollution we make, but if the new era of young people don't start asking and doing something about it, we are not going far.