A Q&A with John Williams, who studies the historical links between the built environment and racial injustice in U.S. cities.

Our new mayor should let our environmental actions do the talking for the next eight years. It would be a refreshing change.

The return to a normal way of life and to renewing our push toward sustainable cities requires that we develop an apolitical, science-driven public health capacity.

With enlightened design, sustainability management and cutting-edge technology we can harness human ingenuity to the practical problems of environmentally sustainable economic development.

It is the leadership that we are seeing from New York’s government and institutions today that will help ensure that the cost structure of New York City’s energy will be able to compete with enlightened cities around the globe.