Learn About Biofuels!

A biofuel is any fuel derived from biological matter.  Here are some examples:

GASOLINE & PETROLEUM
The most commonly used biofuel today - made from biomass that died millions of years ago (think dinosaurs and ancient jungle growth!)  Also, the leading cause of global warming.  Hmmm...  What are some other options?

CORN
Yup, fuel made from corn!  Emissions are lower, but not by much.  Growing all that corn may also require more energy than it actually produces.

SUGAR CANE
A totally sweet fuel!  Fuels made from sugar cane crops can reduce greenhouse gas emissions by up to 56%!  A big success so far in Brazil.

SWITCHGRASS
This amazing plant turned biofuel can reduce greenhouse gas emissions by up to 90%!  Some kinds of switchgrass can also remove CO2 from the atmosphere and store it in the ground.

USED COOKING GREASE
The cooking oil used to deep fry things like french fries and chicken wings can be recycled into fuel!  Fuel made from used cooking grease releases fewer gases and is a great way to REUSE something that would have been thrown away.

KELP
Scientists have recently found that seaweed can be used for fuel as well.  Breaking down the sugars in kelp can create five times as much ethanol as corn.

A NUCLEAR ENERGY UPDATE

United States Secretary of Energy Steven Chu and President Obama announced this week funding for the construction of a new nuclear power plant in Georgia.  This facility will be the first nuclear power plant in the United States to be built in thirty years!

Environmental activists do not often support nuclear energy, but this plan may be a step in the right direction—a direction away from fossil fuels.  Remember that nuclear energy results in no carbon emissions!  This new power plant will cut carbon pollution by 16 million tons each year when compared to a coal-fired power plant.

However, the one major problem still to be solved with this type of power is how to get rid of nuclear waste.   President Obama says we must “accelerate our efforts to find ways of storing this waste safely and disposing of it.”  Secretary Chu has said that he is “convinced that the nuclear waste issue is solvable” and has talked about ways that nuclear waste can someday be recycled.

More information on Nobel-prize winning Energy Secretary Steven Chu to follow!

WHAT IS GLOBAL WARMING?

"Global climate change" or "global warming" began with the Industrial Revolution.  Scientists say that global warming is primarily caused by the "greenhouse gas effect."  Greenhouse gases are the toxins (mostly CO2) released into the air when we burn fossil fuels--oil, coal and natural gas.  Another contributor to global climate change is deforestation (the destruction of trees), illustrated in the photograph below.

During the Industrial Revolution, lots of amazing new technology came along and we've been inventing cool things ever since!  But all this new technology--things like trains, cars, lightbulbs, computers, airplanes and electric toothbrushes--need energy to make them go!  The energy we use to power our cars and our homes comes mostly from burning fossil fuels.  It took millions of years for fossil fuels to be created, but humans have burned much of them up in just a few hundred years and the Earth can't handle it!

The more CO2 we have in the air, the more oceans try to suck it up to balance it out.  The more CO2 the oceans suck up, the warmer they become.  The warmer the oceans become, the more strange weather and wacky temperatures we get!  Strange weather leads to dangerous situations for humans.  Wacky temperature changes leads to the inability of many species of plants and animals to adapt quickly enough, which can lead to extinction.

On land, trees are an amazing natural way to get rid of CO2.  Plants soak up CO2 and store it for energy.  The combination of the greenhouse effect and deforestation has created a problem twice the size!

Obvious solutions:  1) PLANT TREES!  2) STOP BURNING FOSSIL FUELS!

More on global climate change to come!

NUCLEAR POWER - PROS AND CONS

Scientists have attributed global warming to the burning of fossil fuels.  One energy technology that does NOT emit greenhouse gases is nuclear power.

Last week, I went on a tour of the Science and Nature Center at a Nuclear Power Plant with my dad.  Here is some information about the advantages and disadvantages of nuclear power!

ABOVE:  A TYPICAL NUCLEAR REACTOR COOLING TOWER

ADVANTAGES:

·      Does not add to the greenhouse effect (no smoke or carbon dioxide!)

·      Just a small amount of fuel can produce a very large amount of energy.  (One ton of Uranium produces more energy than is produced by several MILLION tons of coal or barrels of oil!)

·      Produces small amounts of waste.

·      Nuclear power plants don’t require as much space as other types of facilities.

DISADVANTAGES:

·      The small amount of waste that is produced is VERY, VERY dangerous.

·      Nuclear waste must be hidden away for many thousands of years so that the radioactivity can die away.

·      Nuclear waste that is buried may be affected or released by floods, earthquakes or deliberate attacks.

·      An accident at a nuclear power plant can be a MAJOR disaster!  Radioactivity can kill people and animals or cause cancer.

·      Nuclear energy comes from Uranium and Uranium is NOT renewable.  Just like coal and oil, we will run out of it someday!

Although nuclear energy is delicate and has caused problems in the past, a modern nuclear power plant can produce power without releasing toxins into the environment (if everything goes right.)  Energy produced by coal and oil cannot do the same.

Is nuclear energy the next step away from dirty energy sources before we can harness the power of sun, wind and water more efficiently?  What do you think?  Do the advantages outweigh the disadvantages?  What else do you know about nuclear power?

ABOVE:  THE NUCLEAR POWER PLANT I VISITED AT SEABROOK STATION IN NEW HAMPSHIRE.