Why do rich countries produce the most carbon dioxide?

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

These issues present challenges for regional urban areas. select all that apply. -housing availability -inadequate services -pollution -reduced population -rural migration