Sunlight shining on specialized floaties can now produce fuel for plants by recovering ammonia from wastewater. Researchers designed a floatable amino-grafted (-NH2) MXene (Ti3C2)-based (AMS) sponge that, when scaled efficiently, can provide two sustainable solutions simultaneously: cleaning up wastewater and providing ammonia (NH3), an essential nitrogen source for plants, to farmers at a lower cost. … According to the findings published in Nature Sustainability, the researchers were able to recover ammonia at the rate of 0.6 mol/m2/h with 99.8% purity using ammonium chloride (NH4Cl) wastewater under 5-sun light intensity, without any added chemicals or energy.