Environment

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Republican presidential candidate and former Arkansas Gov. Mike Huckabee speaks during a campaign event at the Habitue Living Center in Le Mars, Iowa, on Jan. 21, 2016. (Associated Press) **FILE**

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Interior Secretary Sally Jewell speaks in Libreville, Gabon, Friday, Jan. 22, 2016. The Obama administration on Friday, Jan. 22, 2016, proposed new rules to clamp down on oil companies that burn off natural gas on public land, arguing that it will reduce waste and harmful methane emissions as part of President Barack Obama’s bid to curb climate change. Jewell said in a statement that natural gas should be used to power the economy, not wasted by being burned into the atmosphere. (AP Photo/Joel Bouopda Tatou)

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(Amazon)

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Ground-up recycled tire crumbs cover this playground behind the K-2nd grade elementary Dickerson School in Chester, N.J. (Associated Press) ** FILE **

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A researcher holds a container with female Aedes aegypti mosquitoes at the Biomedical Sciences Institute in the Sao Paulo's University, in Sao Paulo, Brazil, Monday, Jan. 18, 2016. The Aedes aegypti is a vector for transmitting the Zika virus. The Brazilian government announced it will direct funds to a biomedical research center to help develop a vaccine against the Zika virus linked to brain damage in babies. (AP Photo/Andre Penner)

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(Amazon)

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In a message to Congress, President Obama said the EPA's new rule "is critical to our efforts to protect the nation's waters and keep them clean." (Associated Press)

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Image courtesy of The Gideons International.

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Democratic presidential candidates (from left) former Maryland Gov. Martin O'Malley, former Secretary of State Hillary Clinton and Sen. Bernie Sanders of Vermont square off at the NBC, YouTube Democratic presidential debate — their last face-to-face meeting before the Iowa caususes on Feb. 1 — in Charleston, South Carolina. (Associated Press)

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At the corner of Iowa and New Hampshire. (Illustration by Dana Summers of the Tribune Media Services)

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Brakes: Russian truckers threaten to disrupt the country's transportation sector over a new Putin-backed toll. (Associated Press)

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In this photo taken De. 18, 2015, President Barack Obama speaks during a news conference in the briefing room at the White House in Washington. On Saturday, Jan. 16, 2016, the president signed emergency declaration and ordered federal aid for Flint, Mich., authorizing the Federal Emergency Management Agency (FEMA) and the Homeland Security Department to coordinate relief efforts. (AP Photo/Carolyn Kaster)

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U.S. Marines walk on the beach at Waimea Bay near Haleiwa, Hawaii, where two military helicopters crashed into the ocean about 2 miles offshore, Friday, Jan. 15, 2016. The helicopters carrying 12 crew members collided off the Hawaiian island of Oahu during a nighttime training mission, and rescuers are searching a debris field in choppy waters Friday, military officials said. (Mariana Keller via AP Photo)