北美页岩气的繁荣导致那里的价格创新低。
The North American shale gas boom has resulted in record low prices there.
他们不这样做的原因，以及为什么环境没有被破坏的原因，都与价格、技术创新、社会变革和政府应对公众压力的监管有关。
The reasons why they don't, and why the environment has not been ruined, have to do with prices, technological innovation, social change and government regulation in response to popular pressure.
尽管最近在开发可再生燃料方面取得了重要进展，但化石燃料价格较低这一因素可能会阻碍清洁能源技术的进一步创新和应用。
Notwithstanding important recent progress in developing renewable fuel sources, low fossil fuel prices could discourage further innovation in, and adoption of, cleaner energy technologies.
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