3. Put the words in the right order and write down their sen-tences:

• depends / this water / on / on / Earth / life / all.
• a / blanket / gases /of / by / surrounded / is / the / Earth.
• layer / the / ozone / scientists / are / about / concerned.

• lakes / to / protect / we / streams / rivers / can / oceans / help.
• the Earth / anyone / can / green / help / to / keep.
• greenhouse / trees / fight / help / effect / and us / give / oxy-gen.
• April / 22 / day / Earth / inhabitants / of / celebrate / Earth.
• air / polluted / for / people / trees / other / plants / but / for / animals / is / not / only bad.
• harmful / for / acid / to / plants / is / rain / rivers / live / in / creatures / them.

All life on Earth depends on water. The Earth is surrounded by blanket of a gases. Scientists  are concerned about the ozone layer.We can help to protect streams, rivers, lakes, oceans.Anyone can help  to  keep the Earth green. Trees help fight greenhouse effect and give us oxygen. 22 of April Earth inhabitants celebrate Earth day.Polluted air is not only bad for people, but for animals, trees, other plants.Acid rain is harmful for rivers, plants, creatures to live in them.