NASA scientists are supporting solar energy, energy-efficient building, and agriculture industries by developing contiguous environmental daily averaged data sets spanning the time period from the early 1980's to near real-time via a user-friendly web site (http://power.larc.nasa.gov) provided by the Prediction of Worldwide Energy Resource (POWER) project. The POWER web site delivers insolation on a horizontal surface and additional radiation parameters produced by the NASA Langley Research Center GEWEX (Global Energy and Water Cycle Experiment) Surface Radiation Budget (SRB) project and the Clouds and Earth's Radiant Energy System (CERES) Fast Longwave and Shortwave Radiative Fluxes (FLASHFlux) project. Meteorological data (e.g. air pressure, temperature, humidity, wind speed) from NASA's Global Modeling and Assimilation Office (GMAO) are also made available. The SRB radiation data covers the time period from July 1983 through December 2007; the FLASHFlux data covers the time period from January 2008 to within one week of near real-time. The meteorological data are adapted from the GMAO Goddard Earth Observing System assimilation models (GEOS versions 4 and 5). The GEOS-4 data covers the time period from January 1983 through December 2007; the GEOS-5 data covers the time period from January 2008 to within 2 – 3 days of current time. Both the radiation and meteorology data are currently on a global 1-degree latitude, longitude grid. Users have a choice of more than 200 parameters that can be output in tabular and/or graphical format on time scales of daily to long-term climatological averages. Insolation and many other environmental parameters (e.g. cloud amount, air pressure, average/minimum/maximum air temperature, relative humidity, dew point temperature, earth skin temperature, wind speed) of interest to the above-mentioned industries are made available on a worldwide basis through the POWER web site. These data sets are used to support numerous projects incorporating solar technologies into energy production and energy efficiency projects.-------- This presentation reviews the derivation of the current POWER web application data sets and provides examples of data usage in the energy efficient buildings sector. One application for the near real-time is building energy usage monitoring using the new RETScreen International Performance Analysis Module that allows for an analysis of monitoring, targeting and verifying building energy usage as a function of meteorological quantities.-------- The presentation concludes by presenting new activities and plans to provide meteorological and solar data sets on a higher resolution grid (1/2 x 1/2 degree latitude and longitude). The meteorological data are from the GMAO MERRA (Modern Era Retrospective-analysis for Research and Applications) atmospheric assimilation and are being incorporated into the POWER data sets (Figure 1). The SRB project is preparing for a general reprocessing that will provide radiation parameters at the higher resolution through within a year or so of current time. The CERES/FLASHFlux project will be used to extend the temporal coverage data to within a week of current time. Sample results of POWER MERRA and new SRB results are presented.-------- Fig 1. Example of POWER 1/2 x 1/2 degree daily averaged maximum air temperature