Is the city of tomorrow already here?

The high cost of energy, crime, choking air pollution.

Around the globe these 21st century challenges are all being met with real innovation.

In England wind energy from the Atlantic is powering London homes.

Police in Los Angeles are crunching big data to solve everyday crime.

And in Seattle, one building is redefining what it means to be green.

Real solutions, but the challenges only grow bigger.

According to the UN, the world 's population will reach 8.3 billion by 2030.

In that same time, greenhouse gases are expected to increase by 25 percent.

The world 's trash nearly doubled

while half of the world will live in areas threatened by lack of water.

What does that mean for cities?

60 percent of us will live in one, and by 2050, 70 percent.

And the demand for clean air, water, energy, and yes, convenience, will skyrocket.

By 2017 nearly half of the world 's population will be online

and almost half of all internet traffic will travel through smart devices.

Imagine, fewer drivers commuting to work, smarter policing,

buildings with no carbon footprint and trash cans that tell us when they're full.

Life in the city of tomorrow could be pretty great

if we develop the technology we have today.