Have you investigated permaculture? It's a system of living and land management that works to "give back" as much as it "takes out," with no leftovers in either side of the "equation." It looks to mimic on the small scale what nature does in the large scale.
Elements of permaculture include: recycling; installing water tanks on house downspouts to collect rainwater, which is then used in the household's gardens; using solar hot-water-heating systems for houses and small offices; organic gardening; home vegetable & fruit gardening; composting waste organics from the household instead of sending them to the tip / garbage dump; "clean" or "closed-system" sewage treatment plants; planting trees and shrubs as wind-breaks; wood-chipping waste wood and using it for mulch, instead of burning the wood in community "slash piles;" and internet-fostered re-use venues such as "Freecycle" and "Craig's List."
Good green ideas for homes:
Gardens:
*** Save all newspapers (and a fair amount of your junk mail, too) and use these on garden beds, under the mulch, instead of those black plastic weed mats. Overlap them, and lay in layers of 1/2-inch to 1-inch thick (1-3 cms). Cover with whatever mulch you were planning to use -- wood chips, pine bark, pea straw, whatever. No, the inks in the printing are not too toxic for this, even on vegetables.
*** Use the big 2-ltr & 3-ltr bottles as protective cover over individual plants in frosty times. Cut off the bottoms and place over a plant, removing the cap for temperature control; or cut off the bottoms and the tops, and use the cylinder around individual plants.
*** In dry times, use big plastic bottles for drip irrigation: the tall thin bottles are best. Dig a hole next to each plant you want to water, as deep as the bottle is tall. Drill several holes in the bottom of the bottle, and stand it into the hole. Push dirt back around the bottle to nearly bury it, leaving only the cap and a little bit of the neck exposed. Fill with water. It'll take a few hours to several days for the water to leak out into the soil, giving the plant slow but steady watering.
*** Compost. Lots of advice on the internet. And, as one famous horticulturist said, you can't go wrong: even if you "do" composting badly, your compost will be excellent for the garden.
*** Compost. Even if you only have a little bucket of kitchen scraps now and then, bury it in your garden or lawn, and it won't be wasted.
*** Compost, and re-use/recycle. I got old, damaged cement blocks from a neighbor's garage: she'd had a fire, and the building was torn down to build a newer, bigger garage. I collected all the blocks I could, and built a beautiful 3-bay compost bin behind my own garage. A friend happened to park behind a bakery one day, where they were throwing 10 rusting wire-mesh bakery shelves (the ones that slide into rolling shelf units, with no-snag finished edges) into the dumpster. They let her take them instead, and she used garden wire to tie them all together into a compost bin, complete with a hinged bottom door that allows access to the rotted bottom layers.
*** Save your shower water, especially from when you first turn on the faucet, waiting for the water to warm up. Put a bucket or two to collect much of this water, and use it on your garden or potted plants.
*** Wash your car on the lawn, instead of on driveway or street.
Plastics:
*** Little things --- Cut the handles and the sealed bottom off of plastic bags, then cut the resulting cylinder along one side to make a flat rectangle of thin plastic. Use inside gift and mailing boxes in place of tissue paper. (But of course, you're already using as few plastic bags as possible, right? :-D )
*** Little things --- the plastic bags inside cereal boxes are ideal for mess-mats for model-makers, fabric painters, and parents of kids being "artistic." These liners are also food-safe, so can be used for fancy cooking and food-decorating projects, especially by kids.
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