1>atmosphere protects from sun radiations.
2>water incerses glucose levels in our body.
3>living organisms get food indirectly (from trees etc.,)and water it allows water to sink slowly so we get water some what speed.
4>yes we can predict it as our weather forecasting department do.
5>forests reduce the speed of air flow by abstracting wind,saves soil from errosion ,forests are responsible for rain i.e, water..........