1. UNFCCC (United Nations Framework Convention for Climate Change) is the best media and US should immediately ratify the Kyoto Protocol (or any such protocol coming into force in future) and should enter into the loop.
2. The economic disparity or income inequality and racial discrimination among the classes in India are too high and unmatchable. So, India is the best example that you can emulate.
3. 3. It will also help reinstate and sustain your political hierarchy in the world which you (US) are possessing since many years.
4. Along with these actions, radical changes in the sectors like economy and politics; and change in the mindset and the life style of the people are inevitable. It requires immense efforts to be put and thorough study of US economy and root of the problem.