One of Pittsburg's 446 bridges as seen from my taxi-looking forward to spending the day at CMU smarter cities research

At Smorgasbord for lunch. Grass-fed meatballs! How does one do that? #sosnyc

Kicking off sustainable operations summit #sosnyc

On my way up to the 61st floor for #sosnyc reception. Did u know the Empire State bldg retrofit will save $Ms in energy?

The harbor at the Vinoy

In Lumpkin Auditorium in Close-Hipp at USC preparing for tomorrow's sustainability summit

At my L Lab leadership class in sustainability at MIT today

Trying out 'The Daily Catch' in the North End

Beautiful view of Freedom Tower on approach to airport tonight

Joel Makower kicks off GreenBiz 12 NYC #GreenBiz

2 degrees this morning

New Orleans riverside tonight and looking forward to August for dinner

Visit to Dow in Midland, Michigan to check out new solar shingles. Www .dowsolar.com

Barcelona goodness

Naeem and Xavier in Barcelona Smart City Expo showing how smarter buildings can make a difference

Sunrise at Logan

Consistent bloomer (see my twitpic 11 11 10) Schlumbergera genus from SE Brazil which I just returned from today!

Ginni Rometty speaking on how to make a smarter city #smartercitiesrio

Getting ready for Smarter Cities kickoff in the historic Rio opera house #smartercitiesrio

Port of Rio sunrise