Oil and gas companies have sidestepped court orders to disclose chemicals used in fracking under the umbrella of being "trade secrets." It is estimated that a combination of more than 600 chemicals are used, many lethal to both animals and humans. Under mounting public pressure, last week Houston driller, Baker Hughes announced willingness to disclose chemicals used to fracture shale rock formations to release natural gas pockets. Haliburton has announced it will do the same.
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