As the world turns to greater use of renewable energy, for both heating and cooling and power generation, more attention has been given to a

The disposal of human waste—arguably one of the oldest problems on Earth—continues as a serious challenge to municipalities and locales

As people throughout the world become aware that the Earth’s resources are limited, many are seeking ways to do their part as consumers.

Plastics, a ubiquitous, man-made element in the modern world, have been enormously beneficial to human society. Plastics are currently used

Modern times have led to modern problems, such as the proper disposal of the massive amounts of commercial and household waste.