Drowning in Plastic, which is available to watch now on iPlayer, features Wildlife Biologist Liz Bonnin.
"[She] visits scientists working at the cutting edge of plastics research," according to the broadcaster. "She works with some of the world's leading marine biologists and campaigners to discover the true dangers of plastic in our oceans and what it means for the future of all life on our planet, including us."
The trailer for the documentary
The 90-minute documentary provoked sadness in those who watched it, with one viewer taking to Twitter to say: "I'm only five minutes into BBC's One's Drowning In Plastic and I'm already crying. What we are causing to our planet we share with these beautiful creatures is absolutely devastating."
"Thank you for watching and for your all your comments," the documentary's star Liz Bonnin tweeted after the program aired earlier this week.
"I want to continue the conversation about turning the plastic tap off at the source. Join me at @RGS_IBG on November 29 for a talk and expert panel discussion about where the plastic buck stops."
You can find the program on iPlayer here