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It's easy to overlook the original source of energy when we flick
on a light switch. Electricity is really bottled
sunshine! Although our household electricity may come from a
coal fired generator, the source of the energy is still the
sun. Coal, and other fossil hydrocarbons like natural gas and
oil, form from the remains of plants and trees, which once grew by
capturing the energy of the sun. This stored energy can then
be converted and released for our use in the form of electricity.
Few of us think about what is required to keep our electric
lights shining constantly. If the electricity that lights your
home comes from a coal fired power station, then a single 100 watt
bulb shining for a whole year requires the burning of some 320
kilograms of coal. So leaving one light on day and night for a
year is really like burning a substantial pile of coal!
Besides producing electricity, the burning of coal unfortunately
creates significant pollutants as well. These include gases
like: sulphur and nitrogen oxide, which cause acid rain and smog;
and carbon dioxide, a greenhouse gas suspected of causing global
warming.
So next time you switch on a light, think of all that has gone
into bottling that sunshine. Remember too, that although you
can't see the pollutants, they’re still out there!
MOVING BEYOND
MATTER
by Ron Hughes
Light is one of those things that is so fundamental that it’s a
little hard to pin down. Scientists still discuss some of the
properties of light which lead them to think of it in significantly
different ways. For everyday purposes, we’re less concerned
with the nature of light and more interested in whether or not we
have enough in order to see.
Light, however, is almost mystical in its power as it supplies
the energy for life on the planet. There is a host of ways, in
which we depend on light every day. Light from the sun is
ultimately behind the food we eat. It’s the source of power
for the vehicles we use for transportation. It keeps us warm
in winter. And it powers the water cycle which provides us
with fresh water. Moment to moment, we use light, both as
direct energy and stored material forms, everyday.
When we think about energy on planet Earth, we trace it all back
to the sun in one way or another. We see the sun as the
source. But, of course, the sun is only able to produce the
energy that gives life to this planet because it is busy releasing
that energy stored in vast quantities of gases that comprise it.
The search for the origin of all matter and all energy might seem
to be a chicken and egg hunt. But obviously it had to start
somewhere with something. That "somewhere" is not a
place and that "something" is not matter. The energy
at work in the universe is not the raw random power we might
expect from an accidental explosion. It is focused and
purposeful. That is why we believe that an Intelligent
Designer and Creator, spirit in nature, stands behind the material
universe.
Among the many things the Bible tells us about God is that God is
light. That is a spiritual statement. We’ve already
seen that the light of the sun is the source of energy for our
planet. It should not surprise us that the God who is light is
the one who created and maintains the cosmos. Only an
intelligent being of unlimited power could set the universe hurtling
through space with such order and precision.
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