Of the total amount of available water on the earth what percent is is frozen at the poles

What was apartheid and how did it restrict the rights of non-whites?

Monk's mound in cahokia is an enormous earthwork very near to the mississippi river. what do archaeologists believe it was used for?

Need this asap : ( which type of wetland is most likely found in warm, forested areas? bogs swamps salt marshes inland marshes