Tag Archive | renewable energy a first course

Wind, Water and Sunlight – Renewable Alternative Energy Sources by: Paul Person

We all know about it. Wind, water and sunlight are three of the best renewable alternative energy sources that we have–in abundance and for free! But one fact remains, we’re not utilizing them to their full potential.

Energy is a very big deal. We use a lot of it, and we get most of it by burning fossil fuels. The world has a limited supply of fossil fuel. It takes millions of years for oil, coal, and natural gas to form in the depths of the earth. Fossil fuel is NOT a renewable energy source. It’s finite. We WILL run out.

Burning fossil fuel for energy is not a good thing for either our health or our planet’s health. The emissions caused by burning fossil fuel are polluting our air – that’s the air we breathe! We’ve got to do better. We have simply got to come up with a way to harness renewable energy sources like wind, water, and sunlight that will provide the energy we need and none of the pollution that we don’t need.

Using wind, water, and sunlight to provide power isn’t a new concept. People have been using wind, water, and sunlight for thousands of years. Wind, water, and sunlight are renewable energy sources; there’s plenty of all three, and none of them add anything bad to the air we breathe. There’s no toxic waste, either.

Refineries must buy crude oil to produce the gasoline and diesel that we use in our cars and trucks. Utility companies must buy the gasoline and diesel that’s used to create much of the electricity that powers our homes. But if we just put the technology that’s already been developed to use to power our cars, our trucks, our homes, and all of the thousands of little conveniences that we rely on and improve on the technology, we can have our power and our clean air both. We won’t have to choose. And wind, water, and sunlight are all free!

Of course, it’s easier said than done. But unless we make a step towards that direction, we will always rely on the fossil fuels to power our lives. Plans have been laid out, technologies are being created, all that’s missing is our will and determination to keep at it until we accomplish our goal.

Click here to see : http://www.environmentalsciencedegree.com/terrific-renewable-energy/

Save Earth, Go With Renewable Energy

“The future is green energy, sustainability, renewable energy.”
-Arnold SchwarzeneggerMany nations still bank upon coal, oil and natural gas in order to meet their energy needs, but dependence on fossil fuels poses two big problems. One is we will soon run out of fossil fuels as we have a finite resource of fossil fuels, and the second is our environment is getting affected badly by fossil fuels as fossil fuels cause water, air, and soil pollution. What’s more; fossil fuels produce greenhouse gases, which contribute to global warming. Considering these factors, now, there is a strong thrust on renewable energy. This article talks about what renewable energy is and how it is helpful for sustainable development in the longer run.Renewable energy is the energy generated from natural resources, such as wind, tides, sunlight, air, and geothermal heat. In other words, renewable energy means generating energy from the natural sources, which are renewable or naturally replenished. These days, scientists are exploring a wide range of renewable energy technologies, including wind power, solar power, biomass, hydroelectricity/micro hydro, and bio fuels for transportation.
Renewable energy resources offer cleaner alternatives to fossil fuels. As compared to fossil fuels, renewable energy resources produce negligible pollution and very fewer greenhouse gases. And renewable energy resources are not going to run out. Here are four main renewable energy resources:

Solar Energy:
Undoubtedly the sun is the most powerful source of energy. We can use solar energy in lighting, heating, and cooling homes or buildings, generating electricity, and a wide range of industrial processes. These days, the technology employed to harvest the sun’s energy is evolving constantly. You can see water-heating rooftop pipes, mirror arrays, photovoltaic cells and many more.

Wind Energy:
Wind energy has been in use for centuries to drive mills, sail ships, and grind grains. These days, wind energy is also used to generate electricity through wind turbines.

Flowing water can be used in order to power water wheels that drive mechanical processes. And the energy of the flowing water can be used to generate electricity.

Geothermal energy:
The heat inside the earth produces steam and hot water, which can be used to produce electricity.

Other renewable energy sources include ocean energy, hydrogen energy, biomass energy and much more. Many companies are working in this domain to spread awareness and encourage the use of renewable energy. Adopting renewable energy resources not only saves the environment, but also ensures sustainable development. Also, it saves our Mother Earth.


World Energy Investment 2016 by Energy Matters

The inaugural annual report on global energy investments from the International Energy Agency reveals investments in renewables made up nearly a fifth of total energy spending last year.

World Energy Investment 2016 states renewables were the largest source of power investment. Spending on renewable power capacity additions may have been flat between 2011 and 2015, but electricity generation from the new capacity rose by around 33% as steep reductions in the cost of solar PV and wind turbines provided more bang for buck.

The report says investment in renewable power capacity last year generates more than enough electricity to cover demand growth.

With regard to grid-scale battery storage, investment increased tenfold since 2010.


Low carbon energy


Fossil fuels are showing signs of increasingly losing their grip, but their claws are still well and truly sunk in. Fossil fuels (including supply and electricity generation) made up 55% of 2015 global energy investment, slipping significantly from 61% in 2014. The share of renewables increased from 16% to 17%.

On the electricity generation front specifically, it’s a very different story. Spending reached USD 420 billion last year, with renewables accounting for about 70% of the total. In the USA, renewable electricity investment accounted for almost 90% of generation; and in the UK, more than 85%.

While an unstoppable energy transition may well be under way, IEA Executive Director Fatih Birol says governments must not only maintain but increase their commitment to achieve energy security and climate goals.

The IEA’s report points out that although power generation capacity coming online last year would have a 420kgCO2/MWh average carbon intensity (compared to 530 kgCO2/MWh for the existing fleet), it’s still a long way off from the 100 kgCO2/MWh average required from operating plants in 2040 for the 2°C climate target.

“Globally, energy investment is not yet consistent with the transition to a low-carbon energy system envisaged in the Paris Climate Agreement reached at the end of 2015,” states the report.

Another statistic that would worry some – nuclear capacity additions attained their highest level in over two decades (10GW).

Further facts and figures from World Energy Investment 2016 can be accessed here (PDF