Green Halloween

Here are some ideas for a happy and green Halloween.
Skip the plastic costumes- If you're trying to be the most realistic pirate, superhero, or villain at this year's bash, then a cheap, store-bought costume might be the way to go—though the hidden dangers and environmental impact should outweigh even the most enthusiastic compliments from other party-goers. Watch out for the soft vinyl—similar to shower curtain material—in many mass-produced costumes: that's likely polyvinyl chloride (PVC), which releases dangerous chemicals. Not exactly something you want covering your face (or your child's)—plus, it can't be recycled.
Get creative at home- So what to do instead? With a little planning and creativity, even the least handy DIYers can put together a costume with items they have at home——try stringing old ping pong balls for Wilma Flintstone's classic necklace, or bending old wire hangers into butterfly wings. Scour your closets (and your friends', and neighbors', and local thrift stores) for flashback fashions you can pair up, trim down, sew together, or dye (naturally, of course).
Choose a kid-friendly carryall - When it comes to hauling all those treasures home, reusable canvas bags get the win over plastic or paper for safety and environmental reasons. Buy your own blank bags and let the little ones decorate them with non-toxic paint—they're sure to be an annual highlight—or browse craft stores and online retailers for seasonal offerings that sport witches, ghosts, and goblins galore. Then keep your kids visible to passing cars with battery-free flashlights.
Keep it simple - The rest of your decorations—plastic spiders, dangling skeletons, spooky scarecrows—should be one-time purchases that you use every year, just like the rest of your holiday decor. When possible, look for reclaimed material; if you’re buying things you know you can't keep—like streamers or paper plates—be sure to look for brands that are both recycled and recyclable.

I can't take credit for this. It's from Treehugger