In Manhattan I have three but add the fourth -- composting -- myself voluntarily, which isn't curbside. I have to walk it to the park where they collect it only

In Manhattan I have three but add the fourth -- composting -- myself voluntarily, which isn't curbside. I have to walk it to the park where they collect it only at certain times. Why? Because it helps me reduce my landfill trash to where I empty it 3 to 4 times per year. Actually, I've reduced my recyclable trash to nearly the same levels.