Directions: Read the following text and complete it using the words given in the options.

Each human being has a legitimate claim to a sufficient and ___X___ amount of Earth’s resources. But with a population approaching 8 billion, even if everyone adopted a relatively low material standard of living like the one ___Y___ found in Papua New Guinea, it would still push Earth to its ecological breaking point. Unfortunately, the "average person" on Earth ___Z___ at a rate over 50% above a sustainable level.