With a cold, snowy winter lingering in many parts of the United States, many of you may be struggling with a perennial winter problem: an icy front walk. That freeze and thaw cycle wreaks havoc even when no snow has fallen recently, and the result can be the equivalent of an ice rink unless you do something about it. People usually resolve the problem by throwing salt down because it lowers the freezing temperature of water, thereby melting ice (until it gets a few degrees colder, anyway).
The problem is that salt is not good for the environment. When salt is used for ice control, it ends up in the soil and in waterways, where it can hurt plants and animals alike. Since many of us don't much fancy this idea, this winter season, we're asking ourselves what we can use instead. Fortunately, many urban areas are way ahead of us on this one, thanks to their extensive inclement weather preparation programs. We rounded up a list of salt alternatives from the mundane to the weird.
Sand provides traction for both feet and wheels. However, the problem with sand is that if it enters waterways, it can create blockages, buildups of silt, and problems with water quality. Unless you have a method for controlling your sand, it's not a hot bet for your stairs and walkway.
2. Calcium magnesium acetate (CMA)
This non-corrosive substance is gentler on the environment, but it's not a cost-effective option. It's more expensive and you have to use twice as much of it.
3. Beet or corn juice
Yes, you read that right. Technically referred to as "carbohydrate-based liquid," this compound has been used on roads across the Midwest and Canada this year. It actively inhibits corroding, is harmless to the environment, and is easy to handle — plus, it's a good way to use up agricultural byproducts. However, you might have trouble finding it for personal use.
4. Potassium chloride or calcium chloride
These salts aren't the same salt discussed above; they're environmentally harmless and in fact are needed nutrients for plants. When they run off as a result of rain and ice melt, they'll be beneficial to the surrounding environment. They're also cost-effective, and available at many hardware and home supply stores.
5. Various commercial products
Numerous companies make de-icers, including eco-friendly products intended specifically for use by people concerned about the environment who want to keep ice at bay. Be sure to check their ingredient lists (avoid those with sodium chloride, which is our old enemy), and make sure they are safe for use.
If you're working in a pinch, homemade de-icers can help for emergencies (but note that these are not as environmentally friendly).
In all cases, you want to limit the amount of de-icer you're using. Start by shoveling well to remove as much snow and ice as possible, because this will help the product work better. You won't need much de-icer to get the ice melting, so be sparing. And remember to stay on stop of shoveling to prevent buildups.
In the spring, your garden will be glad you took it easy on the chemicals.
Related stories on MNN & Treehugger:
- Where the streets reek of cheese: Milwaukee tries dairy waste as de-icer
- Solar-powered roads could make snow disappear
- The best cars for getting you through snow and ice
- Why does salt melt ice, and what else is it doing?
Shovel photo credit: Mikael Damkier/Shutterstock