Page 10 - sustainable tourism-- Dr.Aya

quarters of this energy is used for: • Space

heating; • Hot water production; • Air

conditioning and ventilation; • Lighting.

These are all uses where energy efficiency can

be increased dramatically, and where

renewable energies can also be easily

harnessed by use of simple, proven

technologies. Human quality of life and

productivity relies on secure, affordable and

sustainable energy. As economies expand and

the world population continues to grow,

energy demand is increasing worldwide.

Currently, 80% of the world energy supply

comes from fossil fuels (coal, petrol and

natural gas), which emit greenhouse gases

causing climate change and other negative

environmental impacts. Fossil fuels are finite

and nonrenewable, and their reserves are

decreasing faster than new ones are being

formed. Energy consumption by hotels has a

major environmental impact. Hotels are

among the top five types of buildings in the

service sector for energy consumption, below

food, sales and health care facilities.

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