I'd say many are ready for individual action but are discouraged on a daily basis especially by

- hypocritical politicians and environmentalists traveling the world on first class/private jets

- negativity like yours and the one I originally answered

- misinformation/information overload/infighting: whatever good someone tries to do someone will pop up to explain why it is bad: nuclear, organic, frugality, you name it, someone will magically pop up to tell you how worthless exactly your contribution is.

I say: almost every effort is worthwhile as long as one doesn't actively destroy. At least spread enthusiasm and knowledge.