I believe others who have studied the problem more than I suggest that the bigger impacts include: 1. Quit eating beef. 2. Stay off of airplanes. 3. Have as few children as you can get away with, preferably none.

Building that electric car and those solar panels seem to have a positive impact eventually, but you're still requesting that someone manufacture something. Driving the car you've already got until the wheels fall off is probably the better choice.