Efficacy, definition of

Conversion of atmospheric nitrogen gas into forms useful to plants and other organisms by lightning, bacteria, and blue-green algae; it is part of the nitrogen cycle.

• Appraising Marvel et al.: Implications of forcing efficacies for climate sensitivity estimates
  A guest article by Nicholas Lewis Note: This is a long article: a summary is available here. Introduction In a recent paper[1], NASA scientists led by Kate Marvel and Gavin Schmidt derive the global mean surface temperature (GMST) response of the GISS-E2-R...
• Universal Display Unveils the Most Efficient OLED Kitchen Lights Ever Produced
  The team at Universal Display Corporation recently unveiled prototypes of a sleek, modular OLED kitchen light that blows away a set of environmental specifications proposed in a challenge funded in part by the US Department of Energy...