What if they cut back only a portion of the native trees, let the rest mature, and planted crops between them?
如果只砍伐部分本土树木，让其余的生长，在树间套种粮食作物呢？"The U. S. Renewable Fuels Standard calls for nearly 60% of U. S. ethanol to be produced from [non-food] feedstocks by 2022, " he said.
多尔说：“美国再生燃料标准要求，到2022年美国近60%的乙醇应由[非粮食]作物提炼。”Contaminated wastewater is often used to irrigate food crops, creating significant risks for human health and well-being.
受污染废水通常用于灌溉粮食作物，这对人类的幸福安康造成了重大风险。"There has been a lag, but now the substitution effect is taking place, boosting the demand of indigenous crops, " he said.
他表示：“这里面有滞后因素，但如今替代效应正在显现，从而推高了对本土粮食作物的需求。”Wheat is widely cultivated in the world and the total volume of its annual trade is higher than any other cereal crops.
小麦作为世界上分布范围最广泛、总产量最高、贸易额最大的粮食作物，在世界经济中占有重要的地位。Growing our food on land that used to be intact forests and prairies is killing the planet, setting up the processes of our own extinction.
把茂密的森林和大草原开垦成农田以种植粮食作物的做法不仅正在把我们这个星球逼上绝路，也是在给我们自掘坟墓。This method might be used to help engineer food crops that are resistant to extremely dry conditions.
这种方法可能被用来帮助设计耐受极其干旱条件的粮食作物。But, he said nations have to balance the production of biofuel from food crops, with biofuel from non food resources.
但是，他说国家不得不在粮食作物产出的生物能源和非粮食原料产出的生物资源的数量上求得平衡。Buckwheat is an important resource for food crops and medicine crops, also is one of the traditional agricultural products for exporting.
荞麦是重要的粮食作物和药用植物资源，也中国传统的出口农产品。