While we need to provide leadership and stability to the world, we should do that through diplomacy.

It's incumbent on all of us to remember our history and not repeat our past sins.

We're planting trees to break up the concrete jungle. We're building public transportation and affordable housing.

Recycling more plastics can help local businesses and expand jobs while supporting the goals of sustainability.

We will never end poverty if we don't tackle climate change.

For me, adventures are a vehicle for travelling deep into the fabric of society, coming to know the environmental conditions that shape people's lives and viewing the present in the context of history.

We have an obligation to our men and women in uniform - and to future generations - to do something about the issue of climate change.

2007, according to a Harris poll, 71 percent of Americans believed that climate change was real, that it was human caused.