This resources gives a detailed look at forests, and even what constitutes a forest, because not all countries use the same definition. Deforestation is one of the leading causes of climate change. This resource is recommended for teaching.
Next Generation Science Standards (NGSS)
LS2: Ecosystems: Interactions, Energy, and Dynamics
MS-LS2-4 Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations.
MS-LS2-5 Evaluate competing design solutions for maintaining biodiversity and ecosystem services.