The food and fuel crises had been accentuated by speculative investments in commodities; climate change had been accelerated by the irrational use of natural resources, in particular fossil energy.
粮食和燃料的危机是因为投机性的商品投资而加剧；气候变化是因为无理性地耗用自然资源(尤其是化石能源)而加快。