Answer:
Environmentalists want to keep this from drying.
It covers you, you lose it every day and you'd die without it.
It is a form of plastic money.
What is it that you must give before you can keep it
What has keys but no locks, Space but no room, You can enter but you canβt exit.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.