Which of the following ecosystems is found in a tropical coastal region and is characterized by trees with long roots that prop them up over the salty waters?
a.
the sahara desert
b.
a mangrove
c.
the serengeti
d.
the sahel

How can studying economics us make better choices about how to use scare resources

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

How does the use of fertilizers impact the environment?