1
Something that won't run out is _____.
2
unclean and poisonous things in the air, ground, and water
3
We can _______ electricity using the sun's energy.
4
to put something at risk
5
dependable
6
to make or create something
7
__________ change.
8
We need to ________ our carbon footprints.
9
to become larger
10
become smaller
11
the type of energy we get from the sun
12
ice does this in warm air or water
13
leftover things that we can't use
14
a prefix that means water
15
a type of renewable energy
16
catch something and not let it escape
17
the material that comes from trees
18
go up
19
drop down
