People across the world are becoming increasingly aware of the impact of plastic pollution on the environment. Many initiatives to reduce the amount of single-use plastics and increase plastic recycling have already been implemented. More companies are choosing to substitute plastic packaging with eco-friendly materials. Governments have also taken steps to reduce the amount of plastic entering the waste streams, with policies like the “plastic bag tax”.
Categorize the paragraph by theme.
Themes:
- The Impact of Plastic Pollution on the Environment 
- Initiatives to Reduce Single-use Plastics and Increase Plastic Recycling 
- Substituting Plastic Packaging with Eco-Friendly Materials 
- Government Policies to Reduce the Amount of Plastic Entering the Waste Streams.