As her research progressed, Carson found a sizable community of scientists who were documenting the physiological and environmental effects of pesticides. She took advantage of her personal connections with many government scientists, who supplied her with confidential information on the subject. From reading the scientific literature and interviewing scientists, Carson found two scientific camps: those who dismissed the possible danger of pesticide spraying barring conclusive proof, and those who were open to the possibility of harm and, willing to consider alternative methods, such as biological pest control.