Answer:
1.Mercury, Venus, Earth and Mars
2.global warming and climate change; water pollution and ocean acidification; and loss of biodiversity.
3.
The fact that the Mayans were building great buildings in their period of existence, is a proof that they had a very big political power in the region, and not just political, but also military, economic, cultural power.
Only civilizations that are strong, well organized, and political powerhouses, have been able to build such big structures, because they had the conditions and time for it. For building such big structures, lot of wealth is needed, also lot of workers, and great engineers. The Mayans had it all. They had great engineers, the labor force was provided in general by the slaves, or by the the tribes that they were ruling over, and from all the tributes paid to them by the people they ruled over, they had surplus of wealth, which meant that they can perform such activities without damaging the empire.
Mexico denies promoting illegal migration in the US
Hello did you have a problem with your computer i dont understand
The Earth is divided into degrees of longitude and latitude which helps us measure location and time using a single standard. ... Longitude and latitude lines measure the distance from the Earth's Equator or central axis - running east to west - and the Prime Meridian in Greenwich, England - running north to south.
