Kamal Meattle on how to grow fresh air

Kamal Meattle has a vision to reshape commercial building in India using principles of green architecture and sustainable upkeep (including an air-cleaning system that involves massive banks of plants instead of massive banks of HVAC equipment). He started the Paharpur Business Centre and Software Technology Incubator Park (PBC-STIP), in New Delhi, in 1990 to provide "instant office" space to technology companies. PBC-STIP's website publishes its air quality index every day, and tracks its compliance to the 10 principles of the UN Global Compact, a corporate-citizenship initiative.

Janine Benyus: Biomimicry in action

In the world envisioned by science author Janine Benyus, a locust's ability to avoid collision within a roiling cloud of its brethren informs the design of a crash-resistant car; a self-cleaning leaf inspires a new kind of paint, one that dries in a pattern that enables simple rainwater to wash away dirt; and organisms capable of living without water open the way for vaccines that maintain potency even without refrigeration -- a hurdle that can prevent life-saving drugs from reaching disease-torn communities. Most important, these cool tools from nature pull off their tricks while still managing to preserve the environment that sustains them, a life-or-death lesson that humankind is in need of learning. 

As a champion of biomimicry, Benyus has become one of the most important voices in a new wave of designers and engineers inspired by nature. Her most recent project, AskNature, explores what happens if we think of nature by function and looks at what organisms can teach us about design.

John Kasaona: How poachers became caretakers

John Kasaona is a leader in the drive to reinvent conservation in Namibia -- turning poachers into protectors of species. It’s a standard nature-documentary scenario: a pristine animal habitat under constant threat by the people who live there, hunting, camping, setting fires. But John Kasaona knows there is a better way to see this relationship between people and environment. As the assistant director for the Integrated Rural Development and Nature Conservation (IRDNC) , Kasaona works on ways to improve the lives of rural people in Namibia by involving them in the management of the lands they live on -- and the species that live there with them.

Kasanoa's Community-Based Natural Resource Management (CBNRM) program helps rural villages set up communal conservancies, which manage and use local natural resources in a sustainable manner. Essentially, it's about restoring the balance of land and people to that of pre-colonial times, and allowing the people with the most interest in the survival of their environment to have control of it. His work was featured in the recent film Milking the Rhino.

Susan Savage-Rumbaugh on apes

Into the great debate over intelligence and instinct -- over what makes us human -- Susan Savage-Rumbaugh has thrown a monkey wrench. Her work with apes has forced a new way of looking at what traits are truly and distinctly human, and new questions about whether some abilities we attribute to "species" are in fact due to an animal's social environment. She believes culture and tradition, in many cases more than biology, can account for differences between humans and other primates.

Her bonobo apes, including a superstar named Kanzi, understand spoken English, interact, and have learned to execute tasks once believed limited to humans -- such as starting and controlling a fire. They aren't trained in classic human-animal fashion. Like human children, the apes learn by watching. "Parents really don't know how they teach their children language," she has said. "Why should I have to know how I teach Kanzi language? I just act normal around him, and he learns it."

Joshua Klein on the intelligence of crows

Hacker and writer Joshua Klein is fascinated by crows. (Notice the gleam of intelligence in their little black eyes?) After a long amateur study of corvid behavior, he's come up with an elegant machine that may form a new bond between animal and human.