clean energy, renewable energy, wind, solar power Clean energy refers to power generation methods that do not involve greenhouse emissions. It is sometimes used broadly to refer to energy changes that are considered environment friendly. There are many methods of energy production that do not pollute the atmosphere.

These methods of green energy production include hydro power, solar power, wind power, geothermal power and tidal power.


Effects of climate change are expected to lower economic growth rates and population growth rates. Its a cyclic imbroglio: Lower economic growth results in diminished food supplies, and consequently would result in more hungry people.

Scientific projections paint a gloomy picture of a decrease in crop harvest due to the shortening of the crop growing period and decrease in water availability due to higher rates of evaporation.

In recent years, extreme weather conditions have been witnessed where severe flooding is preceded by extreme drought. Scientists have tried to explain why this is happening now and research is ongoing.

earth temperature rise, 100 years climate graph.


There has been a proliferation of wind farms in recent years mostly catalyzed by more awareness about climate issues in disparate countries.

Across the globe, wind farms are slowly becoming more entrenched as the preferred mode of harnessing natural power as opposed to the situation only a few years ago. Although experts say wind power is not poised to overtake coal power generation any time soon, they nevertheless place a lot of emphasis on the need for more research to make this novel method of electricity generation to be more efficient.

Wind farms are turbines that are interconnected to act as small power stations. The major difference between wind farms and, say, coal power generation is that in wind farms it is the wind that drives the turbines, which in turn generate electricity through electromagnetic induction.


Understanding the basic science behind clean solar energy. Long ago it was discovered that light had some, well, peculiar properties. But let me talk about sound a bit.

If someone is talking around the corner we might hear what they are saying. This is because sound can ‘bend’. This behaviour is very important because it is exhibited by all ‘substances’ called waves. Among the many properties of waves the one property important to us here is that they carry energy.

There are several other behaviour patterns associated with all waves but this article is not about that. Suffice it to say that light and sound have very many similar properties and that they are therefore waves.

But sound and light also have some very distinct differences. Between one hundred and two hundred years ago several discoveries about light brought a scientific revolution because it was discovered that light travels as a ‘particle’ of energy.

Imagine buckets of ‘clean oil’ lined up from the sun to the earth.

Light from the sun travels in ‘packets’ of energy all the way to the earth. Free, clean, limitless, perpetual energy.


Solar homes are said to be the homes of the future. Any building with a large enough roof can be fitted with solar panels and become self sufficient in energy terms. Solar heating has initial high installation costs but requires minimal maintenance making it cost efficient in the long term. Houses fitted with solar power panels typically contribute insignificant CO2 emissions and are therefore recommended for all environmentally conscious home owners.


With summers averaging higher temperatures than any other recorded time, solar hats may provide the solution. Solar hats come with solar-powered fans that help keep you cool when the weather gets hot. Because the sun’s rays possess energy, it is used to propel motors that run small fans keeping you cool and fresh under the scorching sun.


Solar cars combine technology typically used in the aerospace, alternative energy, automobile, bicycle industries.
The design of a solar vehicle is severely limited by the amount of energy input into the car. Most solar cars have been built for the purpose of solar car races. Exceptions include solar-powered cars and utility vehicles.

Energy efficient Solar cars are often fitted with gauges as seen in conventional cars. In order to keep the car running smoothly, the driver must keep an eye on these gauges to spot possible problems.

Solar cars depend on PV cells to convert sunlight into electricity. In fact, 51.8% of sunlight actually enters the Earth’s atmosphere. Unlike solar thermal energy which converts solar energy to heat for either household purposes, industrial purposes or to be converted to electricity, PV cells directly convert sunlight into electricity.

When sunlight (photons) strike PV cells, they excite electrons and allow them to flow, creating an electrical current. PV cells are made of semiconductor materials such as silicon and alloys of indium, gallium and nitrogen. Silicon is the most common material used and has an efficiency rate of 15-20%.


Scientists have proposed a radical new heating system where homes would be heated by district centres rather than in individual households. If implemented, homes will be connected to heating pipes similar to gas piping, but the heating pipes will carry hot water instead of gas.


The ozone layer that shields life from the sun’s harmful rays is projected to recover from harmful chemicals by mid-century, but it will take longer over the polar regions, a United Nations study said recently.

Ozone depletion is blamed for higher ultraviolet radiation that causes skin cancers and cataracts and damages agriculture.


The beginning of the last Millennium saw a “Medieval Warm Period” when temperatures, certainly in Europe, were higher than they are now. Grapes grew in northern England. Ice-bound mountain passes opened in the Alps. The Arctic was warmer in the 1930s than it is today.


Clean energy surrounds us and the challenge is only how to tame it, harness it for our own benefit. A single hurricane has as much energy as 10,000 nuclear bombs.  All the waves around the world have the same amount of energy as a nuclear bomb. Energy that we can use to power our lives is all around us.

We collect it from places it is stored, as fuels like uranium or oil buried deep underground. Or we catch it as it passes, like the energy in flowing water, waves or the wind.

Download climate data pdf here.

  1. Deanna B. Rueda
    September 2, 2009 at 4:34 am

    During the late 60’s and 70’s when there were fewer people, humans rarely experience inconsistency in climate change. They could bathe under the sun without letup and worry. They could expose their skin for a longer duration and work longer under the less scorching sun. Since the UV rays has not penetrated the earth deeply, it was quite safer to continue with outdoor activities. But due to the latter, it seems that global warming has taken its toll to destroy life on earth. Today, humans have been witnessing and experiencing disasters that led to innumerable deaths. Glacier melting caused the rising of the seas which submerged many lands. Wildfires are results from extreme heat because the ozone layer has drastically depleted. Mankind has not enough measure to repair it but at least discovered means to prevent the situation from getting worse. In order to reverse the situation, we should maximize our efforts and time to mend the broken pieces. Nevertheless, it is our planet and our lives that are at stake.

  2. Bat Man
    August 31, 2009 at 5:22 pm

    Global Warming is a bitter fact and so are its consequences. But it is an uglier truth that it can neither be stopped nor paced back. It may sound pessimistic or disheartening but it is true. The fact is we can only contribute towards lowering the rate of increase in Global Warming. We are well aware of its consequences; a few degrees more and Global Warming will leave us with no food and drinking water amidst a never ending ocean spread across the world. Remedy? More trees, lesser green house gases, lesser concrete & lesser population (the last two are impossible for obvious reasons).

  3. knvn
    August 31, 2009 at 3:02 am

    It is a pity that we humans are responsible for bringing on ourselves all sorts of calamities. Global warming is caused by excessive production of ozone layer destroying gases, wild fires are caused by human negligence and we plunder our resources mindlessly. However, when things start going wrong, we blame each other. We don’t really bother to look into our own misdeeds. In the state where I live, uncontrolled sand mining is killing all our life sustaining rivers, but without an economical substitute for building construction, no one knows how to stop this destructive sand mining.

  4. Lea
    August 29, 2009 at 8:24 pm

    I grew up in the seventies, and along with the “Peace” and the “Keep on Trucking” posters, there was one that said “Save Water, Shower with a Friend”. I was very young, so I really didn’t understand the double entendre; but I did understand that that there was a shortage of water. Believe it or not, that started a lifelong awareness that we are the custodians of our planet, and that we can’t take it for granted. I wish that more people would walk the walk rather than just talk the talk. So many people say they are concerned, but continue harmful behavior.

  5. Amit Ashwini
    August 29, 2009 at 4:18 pm

    I highly appreciate your efforts. This is a great platform to raise the issue of global warming at a higher level. It is really commendable. The earth is really getting warmer at an alarming rate due to the negligent human activities. It’s high time we realize the need of putting every single effort on our part to bring down the effects of global warming. The weather, resources and ecosystems have already undergone a drastic change in the last few decades because of the irresponsible ways of the human species. We must understand the criticality of this issue otherwise it would be too late to mend.

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