Energy and Construction - Clima2007

Larry Said:

what are the advantages of renewable energy?

We Answered:

like hydroelectric power, it can be cheap once the capital outlay is paid off. But, everyone now complains about the environmental effects of hydro. All other methods also have significant environmental impacts that society wants to ignore now, that many will come to regret later. there is no free lunch!

Justin Said:

What are the advantages of classifying energy sources as renewable and non - renewable?

We Answered:

it is like arranging colors from whites in you laundry,or classifying biodegradable from non-bio,you can dispose of the non renewable resources easier.

also,another advantage is that if you know that a thing is classified as a non-renwable source,then you could think of ways to conserve this kind of material.

another advantage of classifying it that way is that eventually non-renewable sources of energy will run out and as such they are not permanant solutions to the earth's energy needs.

there you go,hope i helped! ^^

Gene Said:

what are some disadvantages and advantages of renewable resources providing energy in the future?

We Answered:

All details are on their home page

Curtis Said:

Advantages and disadvantages of renewable energy?

We Answered:

Advantages
*Most of it is Free
*easier for people in poor countries to use
*does not pollute the environment or harm people
*can provide jobs for people
*safer (no possibility of exploxions)
*does not produce harmful waste

Disadvantages
*takes a lond time to be produced or grow
*doesnt have the same quality as unrenewable energy(think electricity)
*strong winds can damage windmills, making a big loss
*too much dependence on Mother Nature!

Hope that helps

Jane Said:

What is the role of renewable energy in addressing climate change?

We Answered:

It is a political term to describe power sources that don't emit much CO2 but which can't actually provide the power our civilisation needs (so far no country has managed to get much more than 20% of their power from wind or solar and even then they had to rely on their neighbours' hydro and nuclear as well as their own coal to prevent the grid from collapsing). Hydro is the main renewable energy source for electricity production right now but is opposed by most of the people who claim we need renewable energy (and unlike their opposition to nuclear power they actually have good reasons to oppose hydro).

They are used mainly to delay the switch to nuclear power (which despite being not renewable should be good for millions of years at higher than current energy use) that would allow us to actually solve the global warming problem and thus contribute to global warming by keeping the fossil fuel industry in business.

Basically the way it does that is that a bunch of windmills get built and start supplying power to the grid but because of natural variability in the wind they don't provide that power all the time (20% of rated capacity is considered pretty good for wind) nor can we control when they provide their power so to use wind power you need a source of backup power that is reliable and usually that means fossil fuels (nuclear could be used but if you use nuclear for that then you may as well not bother with the windmills because the windmills would not reduce CO2 emissions or save money). Solar is less variable but PV cells cost a lot more and it still needs backup at night and partial backup on cloudy days. The need for backup means that the fossil fuel industry still gets to exist (and continue pumping CO2 into the atmosphere) if the way to address (if very badly) climate change is to use wind and solar.

Hydro and geothermal have the reliability to be used for baseload although they only work in some locations and hydro power probably won't be used where it can be because of the massive environmental damage building a dam causes.

Wave and Tidal power when you calculate how much energy there is turn out to be way too diffuse to be useful. Biofuels show promise but not much because you need land to grow them on and that land could be better used growing food or even being turned back into forest.

Terrence Said:

What are the Advantages and disadvantage of using Renewable energy sources?

We Answered:

advantage: we dont waste the earth, there is tons of it (thus the word renewable so we will never run out.
disadvantage:it costs ALOT more than other energy sources, because of trasporting it

Daniel Said:

What is the advantage of renewable energy?

We Answered:

you've just said it : it's renewable, it does not consume earth's limited resources