Fruits and vegetable will be dangerous (unless / if) they grow on polluted land.
if
What will happen if we cut down all the trees?
...
If + S + ___________, S + will/won't + V
present simple
If global warming (get) ___ worse, the ice caps (melt) ____.
gets - will melt
Animals will lose their homes unless people (protect / will protect) the forests.
protect
If Mike _______(not listen) in class, he _______ (not understand) the lesson.
doesn't listen - won't understand
What will happen if we use public transportation?
....
If sea levels (keep / will keep) rising, many cities (will flood / flood).
keep - will flood
If she _____ (have) enough money, she ______ (buy) a new laptop.
has - will buy
If we (reuse) ____ water bottles, there (be) ____ less trash.
reuse - will be
You will be late (unless / if) you leave now.
unless
If we protect the elephants, they (not become) ____ extinct.
will not become - won't become
The air will become more polluted unless factories (follow / will follow) environmental laws.
follow
If students (not stop) ____ littering, the school will be full of trash.
don't stop - do not stop
If I _____ (not eat) breakfast, I ____ (be) hungry at school.
don't eat - will be
(Unless / If) we do something now, it will damage the environment.
Unless
The planet (continue) ____ to get hotter unless we (do) ____something.
will continue - do
If there (be) ___ more recycling bins, it (be) _______ easier to recycle.
are - will be