In cities outside the United States, more people live in

The graph below plots the temperature and luminosity of stars on the main sequence.

What are two australian geographical features that hindered early exploration? western plateau gulf of carpentaria great barrier reef great dividing range

The us and canadian governments are doing all of the following to combat environmental problems except a. encouraging the use of public transportation b. enacting clean water policies c. requiring emissions testing d. limiting animal populations in some regions