Regina "Gina" McCarthy, President Obama's chief of the Environmental Protection Agency, has essentially called pollution a force of racism in the US, saying that pollution is "holding back millions of African-Americans." McCarthy made even more strange comments at an April 24 appearance at Clark Atlanta University sponsored by the Hip Hop Caucus, a non-profit group that claims to "mobilize, educate, and engage young people... in elections, policymaking and service projects."