Page 48 - İngilizce 12 | Kazanım Kavrama Etkinlikleri

FUNCTIONS: English 12
• Describing problems
Theme 8
• Making complaints Alternative Energy 23
• Offering solutions
L2
1. Read the text and fill in the blanks with the correct statements.
a it absorbs carbon dioxide not only from the water but also from the air while growing
b the scientists are putting a lot of effort into searching for promising alternative energy sources
c engineers have been working hard to convert kinetic energy
d this gas covers 74% of the universe
e these sources are still far from meeting the world’s growing energy demands
The Future of Alternative Energy

As renewable energy technologies develop, solar, wind and water power have been put into use in recent years.
They have contributed to decreasing the damage caused by fossil fuels, but (1) . As a result of this fact,
scientists have been seeking non-polluting and more affordable alternative energy
sources.
To begin with, hydrogen energy is one of the most promising future energy ideas. It
will provide a big mass power as (2) . It has already been proved that it is a clean
energy source which causes almost no pollution. The only problem is that it is found only
in combination with other elements, and it requires an enormous budget to produce pure
hydrogen power with today’s technology. At present, it is majorly being used in industry,
aviation and heavy shipping because it’s highly expensive. Once the budget problem is
resolved, it will sufficiently provide green electricity and low-carbon fuel.
In addition to hydrogen power, algae production for biofuel has a tremendous potential for
clean energy. Algae is a quick-growing plant that contains energy-rich oils. It’s eco-friendly
in that (3) . They can easily grow in wastewater or man-made ponds; however, algal
biofuel production requires an expensive and time-consuming process. Therefore, the
number of refineries producing algal oils to supply biofuels for planes, trains and cars is
far from ideal. Fortunately, attentive studies have been underway to lower the cost.
How about saving the planet by doing some exercise? Producing energy from the human
body is not a new idea. There have been potential developments in human-powered
electricity generators, but their efficiency is still in question. You may be surprised to hear
that human power has already been used at a gym in Hong Kong and a dance club in
London. In recent years, (4) , which is a free constant power source, into electrical
energy. Doing the required physical movements may be difficult for old or disabled
people, though. Not to mention that it is bad news for couch potatoes! But who knows,
maybe science fiction movies will actually come true.
The inevitable technological progress is, unfortunately, harming nature day by day, so clean energy sources must
be used without delay. Thankfully, (5) , as we still have a long road ahead of us.

2. Read the text again and complete the table.

Alternative source Pros Cons

Hydrogen power

Algal biofuel

Human power

3. Imagine you are working on a project to find an alternative energy source for the future world.
Write an opinion essay including the points below and then talk about your ideas.
• The sustainable source you want to use • The problems it will solve
• The pros and cons of the suggested source

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