CleanTechnica

Like this post? Subscribe to our RSS feed and stay up to date.

As Americans spend $41 million in foreign oil an hour and are left broke at the pump, what plan does Obama have to solve this problem?

Oil is destined to be a heated issue in this upcoming presidential election and Barack Obama’s opposition to the gas tax “holiday” has already been a hot topic. Obama has made it clear that national energy policy needs to be taken in a new direction.

“We send a billion dollars to foreign nations every single day and we are melting the polar ice caps in the bargain,” said Obama. “That has to change.” Read the rest of this entry »

As a barrel of oil hovers around $130, the news has been bombarding us with the obvious effects of high oil prices. As most people weep at the pump, some environmentalists are rejoicing. Gas consumption is down, but there are additional hidden costs to high gas prices that leave even green minded folks with a frown.

1-Difficult to Extract Oil & High Environmental Impact

High oil prices are making it economically viable to utilize oil that is difficult to extract. One example of this is just north of the border.

In the U.S., our single biggest source of foreign oil is from Canada. Although this may be reassuring from a foreign policy standpoint, much of this oil comes with a steep environmental price tag. Known as tar sands oil, 2 tons of sand are needed to produce one barrel of oil in a very resource and energy intensive process.

Read the rest of this entry »

One of my frequent frustrations is getting involved in an energy policy discussion with someone that goes something like this:

Them: I am deeply concerned about global climate change and the effects of mankind’s continued use of dirty fossil fuels on our planet’s health.
Me: I used to operate power plants that produced zero emissions. What do you think about taking a new look at using nuclear power to replace fossil fuel consumption? Them: I do not like nuclear power. We can get all the power that we need by conservation, wind, solar and biomass.
Me: How do you expect for windmills and solar panels to produce power when the wind is not blowing and the sun is not shining? Can you really shut down fossil plants if you build wind turbines and put solar panels on buildings?
Them: No, but the grid can provide all the back-up we need. We already have paid for building the existing plants and should not spend any money on building new ones while we transition to a new economy where we can live within our natural energy income.
Me: But that means that we have to continue extracting and burning fossil fuels when we could be building plants that make them unnecessary.
Them: I do not like nuclear power and do not want to replace one poison with another.

These conversations often go on far longer until either I or my opponent gives up from frustration or exhaustion. Read the rest of this entry »

Today’s topic is inspired by Solar Today magazine. “Scrubbing Carbon from the Breeze” was written by Rona Fried, Ph.D., president of SustainableBusiness.com in the May/June 2008 issue. Unfortunately this particular article is not available online.

As climate change become a more central issue for people and governments around the globe, a lot of people are looking for solutions - fast solutions. If there were a quick and inexpensive way to dramatically reduce the amount of CO2 in the atmosphere, we should go for it right? Well a number of “quick fix” solutions, which have centered around hacking the environment to fight climate change, have been floating around for years. One strategy is to capture the CO2 with plankton and bury it in the ocean (which is much easier and cheaper than pumping it into the ground). Another is to change the composition of our atmosphere to reflect sunlight. Others tend to be more sci-fi and outlandish - but all of them might just turn out to be disastrous. Read the rest of this entry »

With dwindling fossil fuel supplies, coal has been viewed as the energy source of last resort. This outlook is changing as estimated global coal supplies seem to have been severely inflated. Is coal’s future in doubt?

Many experts are saying yes. Professor David Rutledge of CalTech believes that world coal reserves are grossly overstated and could be substantially exhausted this century. This is in stark contrast to earlier forecasts.

Coal Reserves Inflated

In the last 20 years, official coal reserves have fallen by 170 billion tons. To put this number in perspective, global coal consumption in 2007 was 6 billion tons. Reserves figures are dropping far more quickly than actual extraction.

Read the rest of this entry »

When generating electricity, roughly two-thirds of the energy is lost. Heat is created as a byproduct to spin turbines and later wastes away in cooling towers. Chicago has committed to produce 1.5 billion kilowatt hours of electricity by 2010 with a process call combined heat and power or cogeneration, which finds use for the generated heat. This process can be over 90% efficient.

Excess heat can be used for dehumidification, heating water, and process heat. In an ideal world, the electricity and heating loads for the given application are similar. Hospitals, prisons, paper mills, oil refineries, waste water treatment centers, and even large towns can be good candidates for this technology. Your car can even be an example, with waste heat from the engine being used to warm the interior.
Read the rest of this entry »

In light of our new Live Debate on nuclear energy running in our Green Options Discussion Forum, I see an opportunity to provide some context with another gem from the e2 energy series on PBS. e2 energy is a series of well-produced and thought-provoking pieces that go beyond the issues raised in the longer programs. Running time is 3 minutes.

One of the most common arguments against large-scale use of renewable energy is that it cannot produce a steady, reliable stream of energy, day and night. Ausra Inc. does not agree. They believe that solar thermal technology can supply over 90% of grid power, while reducing carbon emissions.

“The U.S. could nearly eliminate our dependence on coal, oil and gas for electricity and transportation, drastically slashing global warming pollution without increasing costs for energy,” said David Mills, chief scientific officer and founder of Ausra.

You may be wondering, how will we have electricity at night or during cloudy weather?
Will we use large banks of batteries or burn candles?

The ability to utilize solar thermal technology after the sun sets is made possible by a storage system that is up to 93% efficient, according to Ausra’s executive vice president John O’Donnell. Read the rest of this entry »

John Hutton, a business Secretary and cabinet minister in the UK, recently said that coal must remain a part of his nation’s energy system.

Although he wants the UK to lead the world in renewable energy, he argues that some form of coal will be needed to work with renewables. The Liberal Democrats, on the other hand, argue that coal cannot be clean without carbon capture and storage. The problem is that technology is still years away from commercialization and the amount of money the UK is investing in its research is small.

This sparring comes while Hutton’s department is considering an application to build the UK’s first new coal plant in 24 years.

The question the UK and the rest of us have to grapple with is: Is coal a part of our energy future at all? Should coal plants have to commit to carbon capture and storage in order to be approved?