what steps could we take to help reduce the harmful effects of human activities on the biogeochemical cycles?

Air pollution is a big thing that needs help. But not sure of ways that we could.
Any suggestions?

Since this is not my area of expertise, I searched Google under the key words "air pollution reduce" to get these possible sources:

(Broken Link Removed)
(Broken Link Removed)
(Broken Link Removed)
(Broken Link Removed)
(Broken Link Removed)

You can do similar searches for other biogeochemical cycles.

I hope this helps. Thanks for asking.

What about riding bicycle to and from work? Or car pool each other.