I pay attention to some other things.
Let's do some simple math.
Let's start with available resources, for example, total water on Earth.
(1) All water (largest sphere over western U.S., 860 miles (1,385 kilometers) in diameter)
V = 4/3πr^3
V = 1,388,055,696 km^3
Every minute 1M single use plastic bottles are produced.
Christ of Redeemer height is 38 m. Let's try to estimate the volume of this cone.
https://en.wikipedia.org/wiki/Angle_of_repose
angle A = 35 degrees
If you don't know math, you can use online tools, i.e.:
https://www.triangle-calculator.com/?what=rt&a=a%3D38+A%3D35&submit=Solve
r = 54.27 m
Now we can calculate the volume of the cone:
V = (πr^2h)/3
V = 117201 m^3 = 0.000117201 km^3
Above is per minute!
There are 1440 minutes in a day, 1.4 billion bottles in a day.
There are 525960 minutes in year, 525 billion bottles per year.
Volume of single use plastic bottles per year is:
V = 61.64 km^3 in a year.
In 100 years it is 6164 km^3.
That is 1/10th of fresh water volume (see the first link above).
Much of it goes to landfills, so not fresh water. However, I will explain below why I started with water.
**Also, this was calculation for single use plastic trash ONLY! **
Reality vs theory:
Go to Bali, or some other tropical island in the middle of an ocean, and see for yourself level of pollution both on beaches (brought by waves and tides) and in the sea.
*So let's modify calculation a bit. Instead of all volume, let's consider volume near the surface only (much of plastic garbage floats). *
https://www.answers.com/Q/What_percentage_of_Earth%27s_surface_is_covered_by_water
https://www.universetoday.com/25756/surface-area-of-the-earth/
S = 4πr2
S = 510000000 km^2
Surface of water is S * 0.71 = 362100000 km^2
To get volume, let's get top 1m, or 0.001 km. Multiplying we get:
V = 362100 km^3
Dividing our yearly plastic bottle trash with above volume of near surface water, we get:
6164 / 362100 ~ 0.02
So we will pollute almost 2% of surface water in 100 years.
***This means that in 100 years, out of every 100 m^3 of water surface, 2 m^3 will be filled with plastic, completely. ***
https://duckduckgo.com/?q=diffusion&t=ffab&ia=web
***This means, given laws of physics, bottles from those 2 m^3 will be spread out over all 100 m^3, and there will be bottle in every m^3. You will not be able to go anywhere, or swim anywhere as there will be bottles everywhere. ***
Now lets think about plastic bags, fishing nets, other trash not mentioned here and how much they are being produced and dumped.
Should I mention straws which some idiots try to use as red herring to distract from everything else mentioned above?