- The Environmental Working Group released its annual "Dirty Dozen" list
- Spinach had the second highest concentration of pesticide residue, up from eighth
- Pears and potatoes joined the list; cherry tomatoes and cucumbers are no longer on it
(CNN)An annual report by the Environmental Working Group found that nearly 70% of samples of 48 types of conventionally grown produce were contaminated with pesticide residues. That's down 6.6 percentage points from last year.