Both statements are false.

Tons of plastic waste ends up in the ocean, with the bulk coming from China and Southeast Asia. However, the concern with straws is the harm they cause to local wildlife at their macroscopic sizes.

Throwing it in a bin reduces the amount of trash that ends up in the ocean, but wind, homeless, gravity, can all result in trash ending up outside of the bin and on a path into the water.

> but wind, homeless, gravity, can all result in trash ending up outside of the bin

Tossing out "homeless" for a reason trash ends up in the ocean really undermines your point and makes you seem like an asshole. Maybe I'm naive, but I've never seen _anyone_ intentionally take things out of the trash and toss them somewhere else. I can't imagine this happening (caused by any human) on a scale where it is worth mentioning before mentioning negligent littering.

I see it happen at least once a week in Santa Monica. When a homeless person digs through a trash bin and leaves all the waste on the sidewalk, it's the equivalent of hundreds of people littering.

A great deal of plastic and other waste in the ocean comes from the fishing industry. If you eat seafood then you're contributing to this.