Statement I: True. Forests act as carbon sinks, and CO\textsubscript{2} fixation provides ecological and economic benefits.
Statement II: True. Pesticides harm pollinators; reducing their use helps protect them.
Statement III: False. Ecosystem services are primarily provided by living organisms (biotic components), not non-living.
Statement IV: True. Pollinators are crucial for the pollination of many crops, thus enhancing food production.
Hence, correct statements are I, II, and IV.