How to find the best solution for troubled roof areas.
Report shows refrigerants could reduce GHG emissions, energy use.
Healthcare facilities focus on recycling, safer chemicals.
New efficiency measures will affect over 2,000 buildings.
Development could improve solar capacity, storage.
Mass killings may inspire similar acts of violence.
Social media giant selects wind energy.
Study shows seven key areas to increase worker engagement.
Larger, private buildings now included in rankings.
Study shows health risks to long periods of standing.