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powerful mild waves that are too quick for humans to see, but can penetrate Earth's ambiance. small, sticky piece of tar emitted by a natural or manmade oil spill that floats within the ocean and often washes up on beaches. process of eradicating harmful pollutants and contaminants from water discarded by houses and businesses, so the water is safe for many makes use of. accidental release of petroleum merchandise right into a physique of water, both by an oil tanker or an offshore oil rig. an event occurring naturally that has large-scale effects on the surroundings and different people, such as a volcano, earthquake, or hurricane. It persevered through the us economy’s slow restoration, growing from an annual value-add of $835 billion in 2008 to $1,480 billion in 2017—an enhance of 77 percent . The services-producing sector, though much bigger, grew 20 percent over the same interval. Meanwhile, the goods-producing sector posted a modest 5 percent increase to real financial dev...