Final answer:
The current concerns associated with 'forests' as a problem of 'input' include biodiversity loss, habitat destruction, overharvesting for timber, unsustainable logging practices, pollution affecting forest ecosystems, and invasive species threatening forest health.
Step-by-step explanation:
The current concerns associated with 'forests' as a problem of 'input' include biodiversity loss, habitat destruction, overharvesting for timber, unsustainable logging practices, pollution affecting forest ecosystems, and invasive species threatening forest health.
Forests have important value in terms of providing ecosystem services for humans, such as carbon sequestration, climate regulation, medicinal resources, watershed protection, soil fertility, pollination services, and recreational and cultural values.