People have reused copper since Antiquity.
Copper has been reused since Antiquity.
France opened Rance Tidal Power Station in 1966.
Rance Tidal Power Station was opened in 1966.
Exhaust fumes cause smog.
Smog is caused by exhaust fumes.
We shouldn't use fossil fuels.
Fossil fuels shouldn't be used.
I think people will stop the global warming.
I think the global warming will be stopped.
Smog damages your lungs.
Your lungs are damaged by smog.
We can prevent deforestation.
Deforestation can be prevented.
If we don't stop the sea level rise, water will flood the Maldives.
If we don't stop the sea level rise, the Maldives will be flooded.
We shouldn't waste natural resources.
Natural resources shouldn't be wasted.
Governments protect pandas.
Pandas are protected.
People have dumped a lot of sewage into Ganges this year.
A lot of sewage has been dumped into Ganges this year.