"很多人乱丢垃圾"用英语怎么说?

Lots of people throw garbage everywhere.

Many people throw rubbish everywhere.

Lots of people drop litter everywhere.

Lots of people litter. 足以

litter就表示“乱丢”

A lof of people throw rubbish everywhere.

A lot of people are litter louts!
litter louts是指那些喜欢在公共场所喜欢乱丢垃圾的人（有鄙视意味～哈）