When attacked by pests, soybeans and other plants produce a hormone called jasmonate, which starts a series of chemical reactions to synthesize more protease inhibitors and strengthen their own resistance. After the pests eat this compound, its Digestive function will be inhibited. Plant biologist Drusia has found that high concentrations of carbon dioxide can cause plants to lose the ability to secrete jasmonate, and the entire "defense channel" will be closed, so the soybean crop's insect resistance will follow The carbon dioxide content increases and gradually weakens. From this we can infer:. ['Soybean yield is affected by air conditions.', 'The main role of jasmonate is to resist pests.', 'Plants that cannot produce jasmonate will be difficult to resist pests.', 'Reducing the carbon dioxide in the air will increase the insect resistance of soybeans.']