• The potency of the marijuana seized by federal law enforcement agencies in 2007 was more potent than it has been in 30 years. Do with that information what you will.

• Reports show that black children are at high risk for environmental asthma triggers.

• Children are being born in the U.S. with birth weights that are lower than they have been in the past 40 years. Related: More and more children are being born into poverty. Related: A mother's obesity puts newborns at risk.

• China leaves the U.S. in its carbon dioxide dust.