What is the safest de-icing product for my walks and drive in consideration of my green space, Calcium Chloride or Sodium Chloride, (Salt)?
May I pick C, none of the above?
Hand removal is always the best option when given a choice. I always say, if the product was not a part of the environment to begin with and the environment is not in lack of or need of this product, then don’t apply it!
Alas, for health and safety reasons we find those times where we have no choice but to decide which deicer to make use of. In that case, I would go on budget, Sodium Chloride (Salt) is much less expensive than Calcium Chloride. Yes, Calcium Chloride is a little easier on green spaces than Sodium Chloride (Salt) but they will both cause damage when applied in excessive amounts. Both can be leached out in the spring if you have good drainage and flush the area with lots of water.
I myself prefer Calcium Chloride, used sparingly; it will work without the addition of moisture and continues working under much colder conditions than Sodium Chloride (Salt). It is also a great help if your tires are stuck in the snow.
Of course, old fashion methods such as sand, sawdust, cinders or kitty litter have their uses– but you might end up with a surprise on your cleaned walk if you pick the latter.