Need help with my marketing homework - environmental forces?

[coco]

"Discuss if and how the external marketing environment is affecting the market for your product and its competitors in terms of supply or demand. How is the external environment causing changes in supply or demand?"

The marketing forces we've discussed are social, economic, technological, competitive, and regulatory forces. Any help would be much appreciated!!!!

[aero]

Regulatory force would be the amount of chemical run off you're company can produce.

[aero]

Thanks