…The Nahua, Nanti along with other groups in the reserve are threatened by contact with workers who could transmit diseases to which they have no resistance. Opponents of the expansion also say that the exploration and drilling could disrupt the nomadic groups' way of life, frightening away the animals on which they depend for food… Addressing these concerns, the company has agreed to reduce the area targeted for seismic exploration, which involves cutting trails and setting off explosive charges, from 30 square miles to slightly more than one square mile…The Company agreed not to build roads in deference to activists. This could provide a route for outside settlers…[It refers to Royal Dutch Shell, SK Energy, Tecpetrol and Sonatrach].