As mentioned in a previous post I made some infographics for the carbon and sulfur cycles. You can go back to that post for a refresher on the legend (colour scheme, layout, etc.) and some discussion. These infographics are not intended to be exhaustive—a Herculean task for the carbon cycle—but hopefully do a good job of illustrating some of the common reaction pathways.

Carbon Cycle

Carbon cycle infographic

Sulfur Cycle

Sulfur cycle infographic