Active /passive sentences about the environment
Governments will have phased out fossil fuels in a decade.
Fossil fuels will have been phased out in a decade (by governments)
Exhaust fumes cause a lot of air pollution in cities.
A lot of air pollution in cities is caused by exhaust fumes.
Deforestation will provoke loss of habitat for many species.
Loss of habitat for many species will be provoked by deforestation.