Despite bans, plastic is still widely used due to its convenience, low cost, and versatility in various applications. While alternatives exist, they may not always be as readily available, affordable, or suitable for specific needs. Furthermore, some individuals and businesses may prioritize convenience and cost savings over environmental concerns, while others may lack awareness of the risks associated with plastic usage. 

Here's a more detailed explanation:

Convenience and Cost:

Plastic is often cheaper and more convenient to produce, transport, and use than alternatives, especially for single-use items like packaging and disposable cutlery. 

Lack of Viable Alternatives:

While there are efforts to develop and promote sustainable alternatives, they may not be readily available or affordable in all situations, especially in developing countries. 

Corporate Interests:

The plastics industry is a large and powerful economic sector, and some companies may resist efforts to phase out plastic. 

Consumer Behavior:

A "throw-away" culture and the convenience of single-use plastics have become ingrained in many societies, making it difficult to change consumer habits. 

Enforcement Challenges:

Bans can be difficult to enforce effectively, particularly in regions with limited resources or infrastructure for waste management. 

Lack of Awareness:

Some individuals may not be fully aware of the environmental and health impacts of plastic pollution or may not prioritize these concerns over immediate convenience.