How could global warming affect polar regions? It will make them warmer
It will make them colder
It won't affect them
It will make it rain more

In 1933 the 21st amendment was added to the u. s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?

Which volcanic eruption caused the most deaths

These factors threaten north americas ecosystems