A few organizations will gladly take them off your hands.

ENVIRONMENT
Twenty-five million tons of extra trash will be produced this holiday season. Here are a few easy things you can do to cut back on waste.
Time to move to the woods.
More than 100 sea turtles in three locations were tested.
A quaint archipelago off the northern coast of Scotland is home to the cutting edge of renewable energy.
A new startup aims to make taking care of the environment more convenient.
If you're lucky.
Financial donations are great, but that's not the only way to help California's evacuees.
It was a disaster of mankind’s own making—and as it raged on, people piped up with some wild ideas about how to put an end to it.
According to WWF, "We are the first generation to know we are destroying our planet and the last one that can do anything about it."
His job was to protect the birds. But nobody was there to protect him.
It can be powered by cast-offs like coconut shells and wood chips.
And that means declines in lizards, frogs, birds, and all the other creatures that feed on those insects.