I see gray piles of crushed concrete as I’m driving by construction sites, looking like gigantic abandoned sandbox projects. We’re likely to see more of these piles as green concepts permeate the building industry.

According to the Concrete Network, recycling concrete from demolition project can result in considerable savings since it saves the costs of transporting concrete to the landfill (as much as $ .25 per ton/mile), and eliminates the cost of disposal (as high as $100 per ton). This savings to the contractor also results in greater environmental benefits, such as protecting natural resources, fewer pollutants from the transport of materials and reduced impact on our landfills.

Palo Alto’s “construction and demolition” program requires 90% of concrete and other inert solids be diverted. Santa Clara requires 50% to be recycled. San Jose, most of the cities within San Mateo county (and the County itself), and nine cities in Alameda county have also implemented these reuse and recycle programs.

Recycling of concrete is a relatively simple process. It involves breaking, removing, and crushing existing concrete into a material with a specified size and quality. The goal of a green remodeler is to use as much onsite as possible, says Iris Harrell of Harrell Remodeling.

Concrete Technology gives five applications of unprocessed recycled concrete, then five different applications after processing, including new concrete. So concrete really can be recycled into more concrete!

The photo is at 3270 West Bayshore as seen from 101. Other concrete piles can be seen at 899 Charleston and at Page Mill and Park. All are in Palo Alto.

So where are all of these Backyard Habitats?

Apparently, it’s a bit labor intensive to get the Certified Backyard Habitat stats city-by city. Thanks to Roxanne Paul of the National Wildlife Federation for sending this partial list before dashing off on her vacation.

Campbell: 12
Cupertino: 9

Los Altos: 16
Los Altos Hills: 3

Los Gatos: 14
Menlo Park: 4

Palo Alto: 17

Saratoga: 5

San Jose: 99
Santa Clara: 9

Landscaper Sherri Osaka told me today that she had one and they’re not that hard to do.

I recently talked with a neighbor in Midtown Palo Alto who’s really into animals. I asked if their backyard landscaping was completed. She showed me how the family had “gone wild” to reintroduce native tree frogs and toads to the environment with their new pond and supporting vegetation.

This family is not alone. The National Wildlife Federation has certified over 80,000 Backyard Wildlife Habitats nationwide. There are 77 certified in San Mateo County and 237 in Santa Clara County!

It seems we can create a landscape that incorporates locally appropriate planting for wildlife and human habitation. Locally-developed Sustainable Landscape Standards give wildlife habitat one point out of 49. The fascination factor is much higher. It is not as difficult as you’d expect to help support wildlife in your backyard. My neighbor incorporated a water feature in the garden for birds and other animals, including local fish. The downside may be that the local egrets eat the fish.

Another gardening for wildlife suggestion is to provide food, shelter, cover, and water for wildlife such as mammals, birds, hummingbirds, salamanders, beneficial insects, bees, and butterflies. You can pick and choose what you want to attract. No one will convince me to support my yard’s ant population.

A third, obvious choice is to eliminate pesticides whenever possible by using integrated pest management practices to preserve native insects, birds, and other small creatures.

At the end of my backyard tour, half joking, I asked my neighbor, “What’s next, bats?” Apparently, the bat houses are already ordered and should arrive by end of summer.