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Sean Moulton and Sofia Plagakis: Are dangerous chemicals stored near you?

Contributors

Federal investigators from the U.S. Chemical Safety Board and other agencies are still sifting through the debris in West, Texas to determine why a fire in a fertilizer plant ignited an explosion of ammonium nitrate that killed at least 14 people, injured more than 200, and destroyed two schools, a nursing home, and dozens of homes.

Earth Talk: Monarch butterflies in sharp decline

Roddy Scheer

The monarch butterfly, royally adorned in black, white and reddish-orange and able to migrate as far as 2,800 miles, is a true wonder of nature. Each year monarchs travel from Canada and the U.S. to hibernate in the forests of central Mexico. But in recent years the monarchs have been in sharp population decline due to habitat loss, eradication of the plants it depends upon and other environmental factors.