Lea Terhune


Mexico City’s air quality challenge

Mexico City has had great successes in improving air quality, but keeping the air clean is still a big challenge, with growing population and industry.

The Americans with Disabilities Act at 25: Millions empowered [video]

The Americans with Disabilities Act has made it possible for those with disabilities to work, attend school and move about in society more than ever before.

New vaccines can take the bite out of diseases

Vaccines for malaria, chikungunya, MERS and TB are just a few of the challenges being tackled by research scientists. There is progress to report.

Clean energy delivers economic growth and jobs

India’s Prime Minister Narendra Modi and U.S. President Obama share a priority: producing clean energy for India. With more than 300 million of India’s...

Ushahidi: Harnessing social media to save lives

Following the 2007 Kenyan presidential election, violence erupted in the streets. To help stop it, a few tech-savvy journalists created a website — later...