"Green" and Happy? Is it possible?

Is it better to live with your head in the sand? I wonder sometimes. After I saw an Inconvenient Truth last summer (I went alone, no one else would go. I cried through the whole thing) I have struggled with a bit of depression. The idea of the natural world being a hostile environment for my children and the idea that they very well might not be having children of their own has left me in a state of chronic stress.
I love reading blogs. Some of my favorites focus on the climate crisis. But I always end up with a knot in my stomach afterward. I've also read a ton of books and have several more right now from the library. I'm thinking about taking a moratorium on worrying about the state of the whole friggin' planet. It's making me sick. So I'm taking them back. They will always be there if I decide to read them.
Does that mean I don't care? Not at all! I care deeply!! I just feel like I know enough right now about what I should be doing. I know we have likely reached peak oil. I know we have likely hit the tipping point. I know the aqua firs are drying up. I totally get that cars have really just got to go. I think I've gathered enough info and it is time to focus that energy on doing instead of worrying. I can't fix it but I can do my part.
In many areas of my life I have decided to start doing instead of thinking. I've also decided that I need to focus on the good things in life. They are so many. By constantly thinking doom and gloom I feel like I've lost more than half a year of my life. I want to be happy and green at the same time. Is it possible?