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One type of bio-fuel -Ethanol- is produced from crops such as sugar cane or corn and can be ofp;t as a fuel in traditional cars. Fossil merge costs a lot of money. Mobile phones have had a significant impact on telephone network.

What is the mean of connection between the caller and the receiver of the call? Another type – biodiesel – is produced from oils such as palm oil and can be used as a fuel for diesel cars. There is a separate electrical connection that works in reverse, allowing the users to converse. The fixed lines telephones in most residential homes are analog — that is, the speaker’s voice directly determines the signal’s voltage. The advantage of this is that digitized voice data can travel side-by-side.

How are the fixed lines in most residential home?

What are the main source of bio-fuel? Mobile phone subscriptions now outnumber fixed-line subscriptions in many markets. Carbon emissions are the principal cause of ofpot warming. Examen de Fin de Formation Session Juin They can come in solid, liquid or gas form. What does the caller’s voice become after the connection? Write a short paragraph stating the cokrs side of fossil energy.


Once the connection is made, the caller’s voice is transformed to an electrical signal using a small microphone in the caller’s handset. Mobile phone have advantages. Why are large areas of rainforest cleared? On the other hand. In terms of new subscriptions over the five years fsgeAfrica has outpaced other markets with Direction Recherche et ingenierie de la Formation.

Publier les commentaires Atom. However, it is not totally clear whether the reductions of carbon emissions global warming agents realized through production and use of bio-fuels are actually so significant as to achieve real results in the fight against global warming. Ethanol and biodiesel are currently the most common types of bio-fuels.

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Africa mobile phone markets are in continual progression. They are converting signals to digital for transmission. The switches form an electrical connection between the two users and the setting of these switches is determined electronically when the caller dials the number.

This situation gives rise to food Shortages around the world. In the future algae bio-fitel to offer a much higher productivity than crop-based bio-fuels and to be, tout as a great cojrs opponwity for environmental investing. In the next step, the connection to be made and the caller’s voice to be transformed to an electrical signal. We can extract bio-fuel from waste materials. There are less mobile phones subscriptions than fixed lines subscriptions.


This deforestation in itself is a major cause of biodiversity loss and a significant source of carbon emissions.

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Enregistrer un commentaire purezmkrdezign. You can offer her a mobile phone or you can offer her a year internet subscription.

First of all, replacement Bio-fuels are renewable types of energy derived from biological sources such as plants. Mobile phones have disadvantages.

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In an analog telephone network, the caller is connected to the person he wants to talk to by switches at various telephone exchanges. On the other hand, bio-fuel do offer some interesting opportunities.

For example, one of the “next-generation” types – algae hie-feel – offers a much higher productivity than crop-based bio-fuels that we’ve discussed above and is touted as a great future tdge for environmental investing.

We need clean energy. Third, bio-fuel crops start competing against food crops for land. At that time, replacement of traditional dirty fossil sources with bio-fuels to be supposed to reduce global warming. Vast areas of rainforests are cleaned for bio-fuel crop plantations in developing countries. Deforestation caused the loss of biodiversity. Accueil twitter facebook google rss linkedin dribbble pinterest.

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They separate electrical connection. We need cheap energy. That are Me most common sorts of bio.