Still yearning for Earth Day learning? Join us April 28 for HMNS’ museum-wide celebration!

Founded in 1970 to commemorate the birth of the modern environmental movement, Earth Day (April 22) aimed to capitalize on an emerging national consciousness about the natural world and channel the energies of anti-war protests in a new direction.

earth day

Gaylord Nelson, a Wisconsin Senator, conceived the idea of a national holiday devoted to environmentalism after a devastating 1969 oil spill in Santa Barbara, Calif. With bipartisan support, the first-ever earth day inspired 20 million Americans to hit the streets and pour into public parks to rally for sustainable living.

Earth Day eventually lead to the creation of the Environmental Protection Agency and the passage of the Clean Air, Clean Water and Endangered Species Acts — but the battle for our earth is far from over.

Keep the celebration going at HMNS this weekend with Mobilize the Earth, a museum-wide event that teaches participants how to make their lives more sustainable and do their part for the planet.

Register an act of environmental service and join with Keep Houston Beautiful and the Hermann Park Conservancy to clean up the green space just north of HMNS, play around in recycled art at the booths inside our Grand Hall and learn about recycling, energy and water conservation.

What: “Mobilize the Earth” Earth Day celebration
When: April 28, 9 a.m. to 2 p.m.
Where: HMNS grounds at 5555 Hermann Park Drive.

To purchase tickets to Mobilize the Earth, click here.

To learn more about Billion Acts of Green, click here.

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HMNS thanks the Marathon Oil Corporation for their continued support of the HMNS Energy Conservation Club, which sponsors HMNS’ annual Earth Day celebration.

Get Smart : Meter or grid?

Throughout the years there have been many different versions of “smart” electronics. Movies are full of ‘evil’ and ‘good’ appliances, from Robbie the Robot to R2-D2. And even some that are just part of the background, like most of the robots in Star Wars and Wall-E. The energy industry has also started to toss around ‘smart’ terms. Not just things like Ohm’s law or Restricted-Universe Census, but smart meters and smart grids. So what are they? Are they the same or are they different? What does “smart” mean?

First of all, smart is not an indication of how well a meter or a grid does on an intelligence test, how many times they beat me at checkers, or how well they plot to overthrow humans and use us as batteries. It has to deal with how well they respond with real time stimuli. Can the system adjust in a real time fashion; can it be run correctly by automation?

A smart meter is like any other electrical meter. It reads how much electricity you use, in terms of Kilowatt hours. The information that the smart meter can give you is far more than a Thomas meter. A smart meter can tell you in real time how much electricity you are using at any given moment. It can also show you your electrical usage over time. You can see when you use the most electricity (probably right after you come home). Armed with that data you can make informed decisions, such as deciding if you want air-conditioning to come on when you get home at 5 p.m. or if you want to avoid peak hours and have the air-conditioning running from 4 – 5 p.m. But a smart grid is something completely different.

Kraftwerksneubau Neurath
Creative Commons License photo credit: Neuwieser

Even though the electrical grid has been growing for over 100 years , it has yet to become smart. The current grid is set for a “use it or loose it” grid. That means that the grid should always have enough electricity to power everything that is currently on it. This creates two types of electrical generation. One is base load and the other is peak load. Base load is what is always on the grid. This is mostly created using coal fired power plants. A Coal fired plant takes a lot of energy to start up, but once you get it going it is easy to keep it going. Because of that coal fired plants are always burning coal. So when you’re at work and the refrigerator is still on, it’s part of the base load. Most of the time the base load handles all our electricity needs. However if there is a large spike of electrical usage, such as the one around 5 p.m. when most people get off of work, the base load is not enough. This is when they can bring on fast startup plants, usually using natural gas as the fuel, and supply the electricity during peak times.

The current grid is rigged for redundancy. The current electrical grid has grown up to offer multiple paths for electricity. This means that if one area of the grid goes down, the electricity can be maneuvered around the broken part. What that means in practice is that just because an area near you looses power, your power may not be interrupted.

Why would a smart grid be better? For our current grid we use mostly large scale power generation plants, but the smart grid would easily incorporate lots of small residential power generators like small solar panels on roofs and small wind turbines. The small solar panel and wind turbines on the current grid are unable to provide all your electrical needs. Even though they take in electricity all day long, they only have available what they are taking in at the moment. If there were a way to store all the electricity that they take in during the day when you aren’t using electricity, then it would help with the electricity you need, especially during peak times. Also in a smart grid, if you had an excess of electricity you could sell it to a power company. You could even sell it directly to people who need the electricity. You would go from one who can only consume, to a producer, seller and consumer of electricity.

Arrays from the right
Creative Commons License photo credit: Mike Weston

How can a smart grid help us save money on our electric bills? Currently most electrical companies charge a single rate for electricity. That means that you pay a constant price for a kilowatt hour. The real cost of electricity is always in flux. The price has to do with what time of day it is, what season, what it was priced at yesterday, which power plants are down for maintenance, which ones have been reopened, the weather and many other variables. A smart grid would allow us to purchase electricity in real time. What if power plant B is selling electricity cheaper than power plant B at 3 a.m.? What if power plant A sells cheaper electricity at 2 p.m. than it does at 5 p.m.? Which one would you like to buy electricity from? When would you buy your electricity if you could store it? It gets even more exciting by adding smart appliances. What if you could tell you dishwasher to only wash dishes during the night if the cost of a kilowatt hour fell to a certain price? What if your water heater could find you a better price for the electricity used to heat water for your morning shower?


So is it green? What do we mean by green, it looks like cooper to me. The real question is how can this help save the environment and money (or if you’re more cynical, money and the environment). A smart grid would have the ability to allow small scale renewables to have a larger effect. In a system where a lot of electrical production would be done on residential or small communal solar cells, wind farms, tidal farms, or back yard geothermal plants, the need for large scale power plants would diminish. Large scale power plants will never be done away with. Mother Nature is far too capricious for that.

electric car charging point
Creative Commons License photo credit: frankh

Why do we need to change the grid if it works? The electrical needs for the country are expected to grow 30 % over the next 25 years. That prediction is counting on nothing new happening. What happens if we all switch to the electric cars during that time? Gasoline prices would drop, but electrical prices would rise, because electricity would replace gasoline as the fuel of choice. Right now that would mean building more and more coal plants.

On a smart grid, with most households having some small renewable power generation, the rise in electrical need may not lead to the building of more coal fired power plants.

So how long will this take? So far it has taken over 100 years to get to where we are today. When electricity first started being used most power plants where small and only provided enough electricity for a few buildings. Over time it became cheaper and more reasonable to have power generation on a larger scale. While this would not require us to reinvent the electrical grid, it would mean upgrading all of it. And all that would take more then four years.

You don’t have to go far to celebrate Earth Day all year!

{ save the earth }
Creative Commons License photo credit: Ana Santos

Earth Day was last week, and the world united to be green-conscious for one day. But many of you may want to do more. Here are some easy, eco-friendly ideas for your own garden so you can remember earth day all year long…

Can I compost this? A site about items to help those of us just getting started composting so we know what can hurt and harm our compost.

How can I recycle this? Get creative if something is made of a material not recycled by your city.

Capture yummy rainwater for your plants during the heat of summer with this rainwater collection system. I have a storebought rain barrel (it is currently completely full from our recent storm) and the faucet at the bottom of the barrel is perfect for filling up my watering can to give my plants a drink.  

Reuse your newspaper to mulch your garden. I haven’t tried this one myself but several sources say it works especially well for vegetable gardens… which is also a green hint if you can grow your own salad!

At this point I can use the herbs in my herb garden to make my own salad dressing (here’s one to try) but the best I can do for the rest of the salad is buy local at the farmers market near my house. If you live in Houston you should definitely take advantage of one of the many farmers markets; the produce is second to none, and with our long growing season, you can access many items during their usual “off season.”

Worms
Creative Commons License photo credit: Яick Harris

My next project at home is vermicomposting… more on that later! Talk about Creepy Crawlies!!

Last but certainly not least… you can sign up your 8 and 9 year old friends for “It’s Easy Being Green” during Xplorations Summer Camps here at the Houston Museum of Natural Science! Nicole blogged about some of the cool activities they’ll be working on to make their homes a greener place!  

… and if you planted a tree this year in honor of earth day don’t forget to water it!