Climate change is already having an enormous impact on the agricultural sector and the world will need to dedicate huge amounts of money, time and energy for adaptation and mitigation over the next 20-30 years.

As the political situation in the United States goes from bad to worse and the Paris climate accord hangs in the balance, there is a ray of hope from some of the world's most important cities including Madrid, Paris and Mexico D.F.

Civil society is in the process of changing its mind about the relative merits of diesel versus gasoline cars and the winner in the current debate is likely to be Nissan, Tesla and other companies launching battery electric vehicles in the coming years