For the last few years, scientists have been trying to come up with new ways to eliminate dangerous, disease-carrying mosquitoes. Genetically modified mosquitoes have been released in some areas, because mosquitoes are developing a natural resistance to some repellents and insecticides. Enter the Environmental Protection Agency’s recent approval of nootkatone, a brand new mosquito repellent and destroyer. The EPA-registered seal of approval means that the new ingredient has been deemed safe for humans and pets, and can now be used to formulate insecticides and repellents. Nootkatone is gaining recognition for its effectiveness as a mosquito repellent, and because it smells like grapefruit.