The problem with this is that the US is notably one of the worst countries to let a cat outside, but because the US dominates the western internet everyone who speaks English gets scolded for leaving a cat outside, if if they have other bigger local environmental problems to solve instead.
They unfortunately kill tons of birds, accounting for three quarters of non-natural bird deaths. :/
Non-paywalled National Geographic link: https://archive.ph/Ysy0C
The problem with this is that the US is notably one of the worst countries to let a cat outside, but because the US dominates the western internet everyone who speaks English gets scolded for leaving a cat outside, if if they have other bigger local environmental problems to solve instead.