The world is urbanizing fast—200,000 people are moving to cities every day in search of homes, jobs, as well as education and healthcare services for their families. Supporting this influx with proper infrastructure and services for water, sanitation, transport, and green spaces will require an estimated $1 trillion each year.
Given the difficulties of further increasing the tax burden or the level of public debt,
Not willing to wait for their national governments to bless them with scarce infrastructure funds, innovative mayors have figured out .
On Earth Day, April 22, history was written. World leaders from 175 parties (174 countries and the European Union) came together at the United Nations to sign the Paris Climate Change Agreement. The signing ceremony far exceeded the historical record for first-day signatures to an international agreement.