Learn about the many different energy resources available from our Earth. Find out the pros and cons of each type: both renewable and nonrenewable.

A collection of photographs highlighting alternative energy sources from fields of wind farms to towers of solar panels.

Observe various severe weather phenomena in this image gallery from WGBH. Weather is the combination of factors -- temperature, wind, snow or rain, and sunlight and clouds -- that happen in a specific place at a specific time. Sometimes...