A lot of U.S. businesses are really going into the agenda of sustainability, and some are making their own commitments in emissions reductions in their own operations.

As each country looks to meet their emissions reduction, energy efficiency, or renewable energy goals, they will look to cities as places where transformational change can make the most difference.

India is a good example of a country that has embarked into wind and solar energy production and creating jobs in it. Other countries can learn from India's experience.

Achieving the aims and ambitions of the Paris Agreement are not a given. The world needs to understand the urgency and complexity of what the international community has embarked upon.