Never get any closer than blank feet when a train is passing through a railroad crossing

Why have the aztec ruins in mexico city not been dug up?

What recommendations would you give to your local community to to decrease the local effects of human impact on the environment? list 2 recommendations and how they will positively impact your community. 3. what recommendations would you give to the global governments to decrease the global effects of human impact on the environment? list 2 recommendations and how they will positively impact our planet.

Xplain one benefit and one risk of making voting mandatory in the united states.