Possible photos to use as needed

Hi -
I found some commercial commons photos we could use if needed for our site here they are:
"Darling Wind Farm" by warrenski's photostream
(a ton of Wind farm photos on his stream)











"Wood Pellets" by thingermejig's photostream (Wood pellets are a form of biomass)








"day 68 Illinois Corn" by Randy Wick's photostream

"Geothermal borehole house" by lydurs' photostream