Wet Crawl Space
Once upon a time this tarp might've been doing the bare minimum, but now its torn, unsealed and completely useless. The ground has moisture in it and that moisture is being evaporated into the home. This can cause major issues in the future, such as causing mold to grow.
Moldy Wood
This is a very bad sign. Mold growth on wood beams will soon rot and the structure of your home will be at stake.
Drainage Matting
The raised dimples on this matting helped trapped water on the liner make its way to the designated drain. It also doubles as an extra protective layer against sharp rocks.
CleanSpace Liner
This liner is 20mil thick and made to reduce moisture in the crawl space. It can also reduce energy bills, because the cool and warm air you pay for stays in your home.