Both fertilizers and manure release nitrogen into natural systems such as rivers, upsetting the natural balance.

化肥和粪肥都释放氮到自然生态系统，如河流，从而破坏自然的平衡。

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And smiling has been clinically shown to lower blood pressure, boost immunity, and even release natural painkillers (endorphins), each of which lowers stress, boosts happiness, and improves health.

微笑在临床上的表现能降低血压，提高免疫力，甚至还能释放出天然止痛药(内啡肽)，这每样都能减轻压力、增加快乐和促进健康。

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Your body will even release endorphins, natural painkillers that promote an increased sense of well-being.

身体甚至释放内啡肽，是能提升身体免疫力的天然止痛药。

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But perhaps frackers, who inject high-pressure fluid into rocks deep underground to release natural gas, are beginning to improve themselves.

FORBES: Can No-Water Fracking Quiet Critics?

Fracking involves the injection of water containing a surfactant and various other chemicals under high pressure into a source rock e.g. shale, causing the latter to fracture and release natural gas (principally methane).

FORBES: British "Fracking" Causes Earthquake -- What Now?

That's just 10% what the plant emits, but Jones argues Skyonic should get credit for avoiding 220, 000 tons of carbon dioxide because it is creating products, like hydrogen, that would otherwise come from natural gas and release lots of carbon dioxide.

FORBES: Page 2 of 2