i believe the 2% figure is global agricultures total energy usage out of total global energy supply. the 5% is more specifically fertilizer from natural gas supply.

fertilizer prices have come back down again, but yeah any time price rises the cost rapidly prices out marginal producers and the consumers at the bottom of the socioeconomic ladder.

I know eurozone fertilizer production seems utterly fucked without access to the cheap russian gas. USA is booming with pipelines and new ammonia production facilities .