that, in order to maintain competitiveness, rich nations have joined this downward slide toward more lax attitudes about pollution

that, for maintaining competitiveness, rich nations join in this downward slide toward more lax attitudes about pollution

that rich nations join this downward slide toward more lax attitudes about pollution because of wanting to maintain competitiveness

that in rich nations, joining this downward slide toward more lax attitudes about pollution is a result of wanting to maintain competition

that wanting to maintain competition is making rich nations join in this downward slide toward an attitude about pollution that is more lax