In countries where development has raised the vast majority of people out of extreme poverty (notably, "the west"), people are using technology to repair damage to the environment and putting their ingenuity into finding ways to prevent further damage. In countries where people don't have ready access to water, decent housing, schools, health care, their priorities are, and must be, to reduce poverty by any means possible. I think that's what he's talking about: you need a certain level of development before you can begin to worry about the environment outside of people's basic human needs.