Woman holding sign about renewable energy, other anti-fracking protesters standing behind her.
Fracking opponents with signs including "No Freakin Frackin".
Woman with anti-fracking sign about mother nature.
Woman holds anti-fracking sign above her head.
Woman holds anti-fracking sign above her head, next to her, another protester with sign talking on cellphone.
Protesters at anti-fracking demonstration with signs about fossil fuels, clean air and pollution of water.
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frackingprotestDenverdemonstrationpoliticsenvironmentanti frackingenergyclimate changeglobal warmingalternative energyrenewable energyfossil fuelsnatural gas