You might also be able to contribute towards a green fund. Not sure what to buy? How about just investing in your local power company? Many energy providers offer their consumers the ability to pay a little bit extra in their bill, usually around $4 a month, with the promise that it will go towards purchasing renewable energy.
Still not enough? Then look into the New Rules Project to help the environment.
Governments can do everything from purchasing green energy to helping land owners use tools to determine if they can turn some open land into a wind farm.
As this article points out, more and more sustainability adds up.
Also check out:
Can I Buy Green Energy in My State?
National Wild Life Federation's Green Tags Program
Shop and Unshop: Economic Action to promote just and sustainable purchasing
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