The speaker 'laid/put a (big) guilt trip on' us [=tried to make us feel bad or sorry] by describing in detail how much waste the average American generates.
“I guess you're just too busy to call.” “I don't need the 'guilt trip', Mom. If you want me to call more often, just say so.”
He's not entirely to blame, but he's not 'guiltless' [='innocent'], either.
(..) -What? -And Buzz is with him! It is Buzz! Woody was telling the truth. -What have we done? -Great! Now I have guilt. We're almost there! Rocky, the ramp! Look out! Quick! Hold onto my tail! -Attaboy, Slink! (..)1995 Toy Story