Diligent, industrious, conscientious, assiduous, sedulous, painstaking, persevering, unflagging, untiring, tireless, indefatigable, studious. energetic, keen, enthusiastic, driven, zealous, busy, with one's shoulder to the wheel, with one's nose to the grindstone.
Scientist believe farmers will grow plants with black leaves. The black leave will be able to change sunlight into energy. Stain believes that these black leaves will help reduce poverty in rural parts of the world. He also believes that termites will eat rusty metal and trees will produce liquid fuel.
