According to the ACEEE's website greenercars.org, even with the damage caused by making & recycling Nickle or Lithium batteries, the complete lifecycle of hybrid cars still rank them as "cleaner" than conventional cars:
SCORE (out of 100 where 100== no pollution)
58 Prius C
57 Fit EV
55 Prius & Civic hybrid
54 Insight hybrid
53 Jetta hybrid & Smart for 2 (nonhybrid) & Scion IQ (nonhybrid)
52 Focus EV & Prius V
51 Fusion hybrid & Spark (nonhybrid)
50 Fiat 500 (nonhybrid) & Fiesta (nonhybrid) & Yaris (nonhybrid)
49 Mini Cooper (nonhybrid) & Mazda2 (nonhybrid) & Sonic (nonhybrid) & Focus (nonhybrid) & Veloster (nonhybrid) & Cruze Eco (nonhybrid) & Sonic (nonhybrid)
I like both my hybrids: I don't like the 5 to 10,000 premium when new, but I liked getting them used for half off, and now I'm getting ~60 MPG with their teeny-tiny 1.0 and 1.3 liter engines
SCORE (out of 100 where 100== no pollution)
58 Prius C
57 Fit EV
55 Prius & Civic hybrid
54 Insight hybrid
53 Jetta hybrid & Smart for 2 (nonhybrid) & Scion IQ (nonhybrid)
52 Focus EV & Prius V
51 Fusion hybrid & Spark (nonhybrid)
50 Fiat 500 (nonhybrid) & Fiesta (nonhybrid) & Yaris (nonhybrid)
49 Mini Cooper (nonhybrid) & Mazda2 (nonhybrid) & Sonic (nonhybrid) & Focus (nonhybrid) & Veloster (nonhybrid) & Cruze Eco (nonhybrid) & Sonic (nonhybrid)
I like both my hybrids: I don't like the 5 to 10,000 premium when new, but I liked getting them used for half off, and now I'm getting ~60 MPG with their teeny-tiny 1.0 and 1.3 liter engines