You can improve your life by reducing your carbon footprint. Scientists may argue over whether the individual choice you make has any actual impact on the climate, but that is not the point. The point is that we all need to feel we make a difference. Using a reusable shopping bag, eating less meat or taking your bicycle to work is one way to do so.
There are many ways to reduce your carbon footprint, and many websites with advice to help you. Find one thing you can easily do and start doing that. Track your progress and when you have established that one thing as a habit, you can start on the next.