Complex sentence: Cannabis with a high THC to CBD ratio produces a higher incidence of psychological effects, and CBD shows antipsychotic and neuroprotective properties, acting as an antagonist to some of the effects of THC.
Split into simpler sentences: Cannabis with a high THC to CBD ratio produces a higher incidence of psychological effects. CBD may show antipsychotic and neuroprotective properties, acting as an antagonist to some of the effects of THC.